Science
'What is this, “The Handmaid’s Tale”?' Exploring moral questions posed by controversial IVF ruling
Is a frozen embryo a child?
The Alabama Supreme Court says yes. In ruling this month that three couples who lost frozen embryos in a storage facility accident could sue for wrongful death of a minor child, the court wrote that the “natural, ordinary, commonly understood meaning” of the word “child” includes an “unborn child” — whether that’s a fetus in a womb or an embryo in a freezer.
Hospitals and clinics across the conservative state have since paused in vitro fertilization services as they scramble to figure out the legal and ethical ramifications of the decision. Transport companies are also on hold as they assess the risks of carrying embryos out of state.
To better understand the ethics of IVF and what this ruling means for clinics, families and the more than a million embryos stored in freezers across the country, we spoke with Vardit Ravitsky, a professor of bioethics at the University of Montreal and president of the Hastings Center, an independent bioethics research institute in New York. The interview has been edited for clarity and length.
You became interested in the ethical issues of IVF as a college student, when a friend asked if you would consider donating an egg.
I was almost 20. I was absolutely fascinated by the notion of carrying a fetus that is not genetically related to you. What does that mean to be the biological mother of a fetus that is genetically not your child? On the flip side, what happens when you give your egg to another woman and you have a genetically related child that is not yours?
The notion of genetic relatedness — IVF kind of broke that. You can now carry a fetus that is not yours; you can give your genetics to another person. That blew my mind, because it took the notion of motherhood that was the same for all of human history and broke it down into two components.
So technology can change our fundamental concept of human beings. And that’s what’s happening here. We’re talking about a batch of cells on ice, and we call it a child. That just wasn’t possible before.
Do people have a common understanding of what an embryo is?
Embryo, fetus and newborn baby are, first and foremost, medical biological terms. An embryo is the name we use in the beginning of the development, up to about 11 weeks pregnancy or nine weeks in embryonic development. Then, when it’s more developed, we call it a fetus. When it breathes on its own, outside of a female body, we call it a baby.
The separate issue is when do we accord these entities moral status? We can call them whatever we want; we can call them cells or we can call them children. That’s a value-based, societal decision.
Do we treat embryos outside of the body morally in the same way that we treat them inside of the body? In most jurisdictions, we treat them differently.
For years, anti-abortion advocates in red states have pushed “fetal personhood” — the idea that life begins at conception and fetuses are children entitled to legal rights. Now Alabama’s Supreme Court has ruled that frozen embryos should be considered children. What ethical questions does this pose?
To imply or say explicitly that [frozen embryos] are children, in the same sense that fetuses are seen as children, to me, that’s a very dangerous development.
Think about it logically: If you have a pregnancy and you do nothing, and there’s no miscarriage, a baby will be born. If you have an embryo in a dish in a freezer and you do nothing, there will not be a baby.
I would like women to have access to abortion because I care about their health and autonomy and their freedom to choose. When it comes to frozen embryos, it has nothing to do with a woman and with her body.
The potential of these embryos to become babies or children depends on so many steps: They have to be thawed, they have to continue to develop, they have to be implanted in the uterus, the uterus has to accept them, pregnancy has to develop. These are all steps that can still go wrong. To think of them as children in the same way that we think about newborns or fetuses is just, to me, going so far in how we understand the concept of a child.
In a concurring opinion, Alabama Chief Justice Tom Parker wrote that the people of the state adopted the “theologically based view” that “human life cannot be wrongfully destroyed without incurring the wrath of a holy God, who views the destruction of His image as an affront to Himself.” What does this mean for the future of IVF in conservative states?
Even if you say life begins at conception — for religious reasons or for any other values that you hold — you could still assign different moral values to the two scenarios of conception: outside of the body or inside of the body.
But if you take the view that life starts at conception and you apply that to in vitro, you are potentially shutting down IVF facility care. For clinics, as we’ve already seen beginning to happen, there are risks of handling human embryos that are very fragile biological entities. If the law treats them as children, then clinics rightly freak out about all that could happen to them during fertility treatments.
Unfortunately, accidents happen in clinics: freezers malfunction, embryos get destroyed by accident. Sometimes they have to be tested, and the testing harms them.
Does treating embryos as children necessarily call into question clinics’ ability to provide IVF?
Even if there’s technically the possibility of continuing to provide IVF, under this framework of “embryos are children” … if you’re actually convinced that you’re treating children under the microscope, the risks are so huge that I don’t see how clinics will continue to function long-term.
What ethical and legal dilemmas do clinics face?
What is the extent and the nature of their liability if something happens to an embryo? Is it criminal liability? What part of the law would they be liable for?
Now, in the current reality, couples can agree to the destruction of their embryos, they can donate them for research, they can allow genetic testing of those embryos. If this is a child that deserves independent protection, then what the couple wants becomes irrelevant.
If I owned a fertility clinic, I’d be very scared right now. If you treat embryos seriously as children, you cannot justify any level of risk. You cannot justify using them for training, for research. If we don’t allow genetic testing, we’re slowing down the quality of facility care, entire programs of research that are critical to biomedicine. The ripple effects are huge.
Could clinics be required to maintain all the frozen embryos they have in perpetuity?
Absolutely. If you don’t know what to do with them, other than implant in the uterus and start a pregnancy, then the obvious alternative under this ruling is to keep them frozen indefinitely, which costs hundreds of dollars a year. Currently, if parents abandon their embryos and stop paying the storage fee, clinics can destroy them after five years. But if that’s no longer an option, they will just accumulate and accumulate.
There are over a million frozen embryos in the U.S. today. And that number is growing all the time, because every time a woman undergoes a cycle, most often not all the embryos are used. So every cycle of IVF potentially leaves a few behind in a freezer. For clinics to carry that cost is a significant burden; IVF is already exceptionally expensive.
If a frozen embryo is viewed as a child, could it be interpreted as having a right to be implanted and born?
Absolutely yes. Celine Dion famously said that her frozen embryos in New York are children waiting to be born. You know Sofia Vergara from “Modern Family”? Her ex named their frozen embryos and sued in their name — they were the plaintiffs — that they have a right to be born. He argued he can make that happen because he has created a trust in their name, he has a surrogate, he will father them, he will take responsibility; they will want for nothing. He said leaving them on ice is like murdering them.
The court in Louisiana dismissed the case on a technicality that the embryos were created in California. They didn’t say, “You’re being ridiculous!” So that line of thinking — that frozen embryos have a right to be implanted in order to be born — has already been tried in the U.S., and it wasn’t even refuted fully.
What is this, “The Handmaid’s Tale”? Catch women and impregnate them because [embryos] have a right to be born? Where do we stop?
So what’s the fate of the more than a million embryos stored in freezers?
If state after state adopts this approach, then in those states, you will not be able to discard embryos or donate them for research or literally do anything with them, except seize them for reproduction. Will you be allowed to ship them to another state becomes the big question.
What does this ruling mean for patients in Alabama and other states with fetal personhood laws?
If I were in the middle of a cycle, and my eggs have not been retrieved yet, and I haven’t gone through fertilization, I’d be questioning whether I want to continue in Alabama. Because I wouldn’t know what I would be allowed to do with the embryos. If I had frozen embryos in Alabama, I would definitely look into shipping them to another state.
We have to remember that people going through IVF are very vulnerable. It’s a high-stress situation anyway, without the added layers of complexity and fear. At a medical level, such stress when you’re going through such an intricate process is definitely not in the best interest of patients.
As IVF clinics will shut down and move to other states, we’ll start seeing reproductive tourism within the U.S., just like we’re seeing with abortion. But the ethical problem with that is equity. Poor couples without resources will just not have access to IVF anymore.
It’s been more than 45 years since the world’s first baby conceived by IVF was born in the U.K. What was the significance of that technological development, and what were the key discussions when IVF was developed?
At the time, they were called test-tube babies. That’s a term that we’ve luckily abandoned, because it implied that they’re artificial children. Some people saw the actual methods of fertilizing the egg outside the body as violating the sacred nature of the creation of life. The Catholic Church was and still is against this, because of the method of conception.
The other concern was, “Oh, these children will be stigmatized. They will not be like other children.” Beyond medical risks that we didn’t know about at the time, how will they be viewed by society? Now it’s so normalized. In some countries, 1 in 6 children is born from assisted reproduction.
Do you think this is a real turning point?
If you think globally, Catholic countries have grappled with the status of embryos for years. Germany, for example, does not allow the destruction of embryos, because the embryos are defined as a person in the Constitution. And that’s for the historical reason that they reject any kind of selection associated to life and will do anything to protect the dignity of human life. So this is new to the U.S., but it’s not new in the world.
The shift has been from worrying about the technique, in itself, to worrying about who’s using it: gay couples using it, lesbian couples using it, single people using it with egg or sperm donation.
A married heterosexual couple using it to overcome infertility has become a nonissue. It became just medical care, no moral issues associated, other than: What do you do with your leftover frozen embryos that still remain?
Science
Pink Fire Retardant, a Dramatic Wildfire Weapon, Poses Its Own Dangers
From above the raging flames, these planes can unleash immense tankfuls of bright pink fire retardant in just 20 seconds. They have long been considered vital in the battle against wildfires.
But emerging research has shown that the millions of gallons of retardant sprayed on the landscape to tame wildfires each year come with a toxic burden, because they contain heavy metals and other chemicals that are harmful to human health and the environment.
The toxicity presents a stark dilemma. These tankers and their cargo are a powerful tool for taming deadly blazes. Yet as wildfires intensify and become more frequent in an era of climate change, firefighters are using them more often, and in the process releasing more harmful chemicals into the environment.
Some environmental groups have questioned the retardants’ effectiveness and potential for harm. The efficiency of fire retardant has been hard to measure, because it’s one of a barrage of firefighting tactics deployed in a major fire. After the flames are doused, it’s difficult to assign credit.
The frequency and severity of wildfires has grown in recent years, particularly in the western United States. Scientists have also found that fires across the region have become faster moving in recent decades.
There are also the longer-term health effects of exposure to wildfire smoke, which can penetrate the lungs and heart, causing disease. A recent global survey of the health effects of air pollution caused by wildfires found that in the United States, exposure to wildfire smoke had increased by 77 percent since 2002. Globally, wildfire smoke has been estimated to be responsible for up to 675,000 premature deaths per year.
Fire retardants add to those health and environmental burdens because they present “a really, really thorny trade-off,” said Daniel McCurry, an assistant professor of civil and environmental engineering at the University of Southern California, who led the recent research on their heavy-metal content.
The United States Forest Service said on Thursday that nine large retardant-spraying planes, as well as 20 water-dropping helicopters, were being deployed to fight the Southern California fires, which have displaced tens of thousands of people. Several “water scooper” amphibious planes, capable of skimming the surface of the sea or other body of water to fill their tanks, are also being used.
Two large DC-10 aircraft, dubbed “Very Large Airtankers” and capable of delivering up to 9,400 gallons of retardant, were also set to join the fleet imminently, said Stanton Florea, a spokesman for the National Interagency Fire Center in Boise, Idaho, which coordinates national wildland firefighting efforts across the West.
Sprayed ahead of the fire, the retardants coat vegetation and prevent oxygen from allowing it to burn, Mr. Florea said. (Red dye is added so firefighters can see the retardant against the landscape.) And the retardant, typically made of salts like ammonium polyphosphate, “lasts longer. It doesn’t evaporate, like dropping water,” he said.
The new research from Dr. McCurry and his colleagues found, however, that at least four different types of heavy metals in a common type of retardant used by firefighters exceeded California’s requirements for hazardous waste.
Federal data shows that more than 440 million gallons of retardant were applied to federal, state, and private land between 2009 and 2021. Using that figure, the researchers estimated that between 2009 and 2021, more than 400 tons of heavy metals were released into the environment from fire suppression, a third of that in Southern California.
Both the federal government and the retardant’s manufacturer, Perimeter Solutions, have disputed that analysis, saying the researchers had evaluated a different version of the retardant. Dan Green, a spokesman for Perimeter, said retardants used for aerial firefighting had passed “extensive testing to confirm they meet strict standards for aquatic and mammalian safety.”
Still, the findings help explain why concentrations of heavy metals tend to surge in rivers and streams after wildfires, sometimes by hundreds of times. And as scrutiny of fire suppressants has grown, the Forestry Service has set buffer zones surrounding lakes and rivers, though its own data shows retardant still inadvertently drifts into those waters.
In 2022, the environmental nonprofit Forest Service Employees for Environmental Ethics sued the government in federal court in Montana, demanding that the Forest Service obtain a permit under the Clean Water Act to cover accidental spraying into waterways.
The judge ruled that the agency did indeed need to obtain a permit. But it allowed retardant use to continue to protect lives and property.
Science
2024 Brought the World to a Dangerous Warming Threshold. Now What?
At the stroke of midnight on Dec. 31, Earth finished up its hottest year in recorded history, scientists said on Friday. The previous hottest year was 2023. And the next one will be upon us before long: By continuing to burn huge amounts of coal, oil and gas, humankind has all but guaranteed it.
The planet’s record-high average temperature last year reflected the weekslong, 104-degree-Fahrenheit spring heat waves that shuttered schools in Bangladesh and India. It reflected the effects of the bathtub-warm ocean waters that supercharged hurricanes in the Gulf of Mexico and cyclones in the Philippines. And it reflected the roasting summer and fall conditions that primed Los Angeles this week for the most destructive wildfires in its history.
“We are facing a very new climate and new challenges, challenges that our society is not prepared for,” said Carlo Buontempo, director of the Copernicus Climate Change Service, the European Union monitoring agency.
But even within this progression of warmer years and ever-intensifying risks to homes, communities and the environment, 2024 stood out in another unwelcome way. According to Copernicus, it was the first year in which global temperatures averaged more than 1.5 degrees Celsius, or 2.7 degrees Fahrenheit, above those the planet experienced at the start of the industrial age.
For the past decade, the world has sought to avoid crossing this dangerous threshold. Nations enshrined the goal in the 2015 Paris agreement to fight climate change. “Keep 1.5 alive” was the mantra at United Nations summits.
Yet here we are. Global temperatures will fluctuate somewhat, as they always do, which is why scientists often look at warming averaged over longer periods, not just a single year.
But even by that standard, staying below 1.5 degrees looks increasingly unattainable, according to researchers who have run the numbers. Globally, despite hundreds of billions of dollars invested in clean-energy technologies, carbon dioxide emissions hit a record in 2024 and show no signs of dropping.
One recent study published in the journal Nature concluded that the absolute best humanity can now hope for is around 1.6 degrees of warming. To achieve it, nations would need to start slashing emissions at a pace that would strain political, social and economic feasibility.
But what if we’d started earlier?
“It was guaranteed we’d get to this point where the gap between reality and the trajectory we needed for 1.5 degrees was so big it was ridiculous,” said David Victor, a professor of public policy at the University of California, San Diego.
The question now is what, if anything, should replace 1.5 as a lodestar for nations’ climate aspirations.
“These top-level goals are at best a compass,” Dr. Victor said. “They’re a reminder that if we don’t do more, we’re in for significant climate impacts.”
The 1.5-degree threshold was never the difference between safety and ruin, between hope and despair. It was a number negotiated by governments trying to answer a big question: What’s the highest global temperature increase — and the associated level of dangers, whether heat waves or wildfires or melting glaciers — that our societies should strive to avoid?
The result, as codified in the Paris agreement, was that nations would aspire to hold warming to “well below” 2 degrees Celsius while “pursuing efforts” to limit it to 1.5 degrees.
Even at the time, some experts called the latter goal unrealistic, because it required such deep and rapid emissions cuts. Still, the United States, the European Union and other governments adopted it as a guidepost for climate policy.
Christoph Bertram, an associate research professor at the University of Maryland’s Center for Global Sustainability, said the urgency of the 1.5 target spurred companies of all kinds — automakers, cement manufacturers, electric utilities — to start thinking hard about what it would mean to zero out their emissions by midcentury. “I do think that has led to some serious action,” Dr. Bertram said.
But the high aspiration of the 1.5 target also exposed deep fault lines among nations.
China and India never backed the goal, since it required them to curb their use of coal, gas and oil at a pace they said would hamstring their development. Rich countries that were struggling to cut their own emissions began choking off funding in the developing world for fossil-fuel projects that were economically beneficial. Some low-income countries felt it was deeply unfair to ask them to sacrifice for the climate given that it was wealthy nations — and not them — that had produced most of the greenhouse gases now warming the world.
“The 1.5-degree target has created a lot of tension between rich and poor countries,” said Vijaya Ramachandran, director for energy and development at the Breakthrough Institute, an environmental research organization.
Costa Samaras, an environmental-engineering professor at Carnegie Mellon University, compared the warming goals to health officials’ guidelines on, say, cholesterol. “We don’t set health targets on what’s realistic or what’s possible,” Dr. Samaras said. “We say, ‘This is what’s good for you. This is how you’re going to not get sick.’”
“If we were going to say, ‘Well, 1.5 is likely out of the question, let’s put it to 1.75,’ it gives people a false sense of assurance that 1.5 was not that important,” said Dr. Samaras, who helped shape U.S. climate policy from 2021 to 2024 in the White House Office of Science and Technology Policy. “It’s hugely important.”
Scientists convened by the United Nations have concluded that restricting warming to 1.5 degrees instead of 2 would spare tens of millions of people from being exposed to life-threatening heat waves, water shortages and coastal flooding. It might mean the difference between a world that has coral reefs and Arctic sea ice in the summer, and one that doesn’t.
Each tiny increment of additional warming, whether it’s 1.6 degrees versus 1.5, or 1.7 versus 1.6, increases the risks. “Even if the world overshoots 1.5 degrees, and the chances of this happening are increasing every day, we must keep striving” to bring emissions to zero as soon as possible, said Inger Anderson, the executive director of the United Nations Environment Program.
Officially, the sun has not yet set on the 1.5 target. The Paris agreement remains in force, even as President-elect Donald J. Trump vows to withdraw the United States from it for a second time. At U.N. climate negotiations, talk of 1.5 has become more muted compared with years past. But it has hardly gone away.
“With appropriate measures, 1.5 Celsius is still achievable,” Cedric Schuster, the minister of natural resources and environment for the Pacific island nation of Samoa, said at last year’s summit in Azerbaijan. Countries should “rise to the occasion with new, highly ambitious” policies, he said.
To Dr. Victor of U.C. San Diego, it is strange but all too predictable that governments keep speaking this way about what appears to be an unachievable aim. “No major political leader who wants to be taken seriously on climate wants to stick their neck out and say, ‘1.5 degrees isn’t feasible. Let’s talk about more realistic goals,’” he said.
Still, the world will eventually need to have that discussion, Dr. Victor said. And it’s unclear how it will go.
“It could be constructive, where we start asking, ‘How much warming are we really in for? And how do we deal with that?’” he said. “Or it could look very toxic, with a bunch of political finger pointing.”
Science
U.S. Efforts to Cut Emissions Stalled in 2024 as Power Demand Surged
America’s efforts to cut its climate change pollution stalled in 2024, with greenhouse gas emissions dropping just a fraction, 0.2 percent, compared to the year before, according to estimates published Thursday by the Rhodium Group, a research firm.
Despite continued rapid growth in solar and wind power, emissions levels stayed relatively flat last year because demand for electricity surged nationwide, which led to a spike in the amount of natural gas burned by power plants.
The fact that emissions didn’t decline much means the United States is even further off-track from hitting President Biden’s goal of slashing greenhouse gases 50 percent below 2005 levels by 2030. Scientists say all major economies would have to cut their emissions deeply this decade to keep global warming at relatively low levels.
Since 2005, United States emissions have fallen roughly 20 percent, a significant drop at a time when the economy has also expanded. But to meet its climate goals, U.S. emissions would need to decline nearly 10 times as fast each year as they’ve fallen over the past decade. That seems increasingly unlikely, experts say, especially since President-elect Donald J. Trump has promised to dismantle Mr. Biden’s climate policies and promote the production of fossil fuels, the burning of which generates greenhouse gases.
“On the one hand, it is notable that we’ve now seen two years in a row where the U.S. economy grew but emissions went down,” said Ben King, an associate director at the Rhodium Group. “But it’s far from enough to achieve our climate targets.”
The biggest reason that U.S. emissions have fallen in recent years is that electric utilities have been retiring their older, dirtier coal-fired power plants and replacing them with cheaper and less-polluting natural gas, wind and solar power. That trend mostly continued last year, with a few unexpected ups and downs.
The nation’s demand for electricity, which has stayed more or less flat for two decades, suddenly jumped by roughly 3 percent in 2024, in large part because scorching heat during the summer caused many Americans to crank up their air-conditioners. A smaller factor was that tech companies have been building more energy-hungry data centers in states like Virginia and Texas.
While power companies installed large numbers of wind turbines, solar panels and batteries last year to meet rising demand, natural gas use also rose to record highs, while coal use declined only slightly. The net result was that emissions from the power sector increased an estimated 0.2 percent, according to the Rhodium Group.
At the same time, transportation, the nation’s largest source of greenhouse gases, saw an 0.8 percent rise in emissions last year. Gasoline and jet fuel consumption both increased as Americans continued to drive and fly more after the pandemic. Nearly 10 percent of new car sales in 2024 were less-polluting electric vehicles, but those models still make up a small fraction of total cars on the road and have yet to put a major dent in transportation emissions.
On the flip side, emissions from America’s industrial sector — which includes steel, cement and chemicals — fell by 1.8 percent in 2024. Some of that may have been the result of lost output, as two hurricanes and a strike at the nation’s ports disrupted some factory activity in the fall, Mr. King said.
“It’s a reminder that there’s always some bumpiness in emissions,” Mr. King said. “It’s not just a question of how many electric vehicles are on the road or how much solar we’ve installed. A big portion of our economy still relies on fossil fuels.”
One of the most striking findings in this year’s data was that emissions from oil and gas operations dropped roughly 3.7 percent in 2024. Even though the United States produced record amounts of oil and near-record amounts of natural gas last year, many companies appear to have curbed leaks of methane, which is the main ingredient in natural gas and which can seep into the atmosphere and contribute significantly to global warming.
Over the past few years, the Biden administration and several states have adopted new regulations that require oil and gas producers to detect and fix methane leaks. Many companies also have financial incentives to capture methane to sell rather than vent it into the air.
Between 2014 and 2024, U.S. companies appear to have reduced the amount of methane that escaped, per each cubic feet of gas they produced, by 40 percent, according to the Rhodium Group.
Several experts have estimated that greenhouse gases generated in the United States could start dropping sharply in the years ahead if many clean energy policies stay in place, particularly the 2022 Inflation Reduction Act that pumped hundreds of billions of dollars into low-carbon energy technologies such as electric vehicles, wind turbines, solar panels, nuclear reactors, green hydrogen and batteries.
While Mr. Trump has pledged to scrap many of Mr. Biden’s subsidies and tax credits for electric vehicles and low-carbon energy, it remains to be seen whether Congress will agree.
That law has not yet had a major impact on the country’s emissions, said Mr. King, since it takes time for new factories to open and power plants to get built. But, he said, data shows that low-carbon energy and transportation now make up fully 5 percent of total U.S. private investment.
“That’s a leading indicator that things are changing quickly,” he said.
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