Air Date: Week of January 23, 2026

Dr. Vanessa Kerry (second from left) speaks at the Foreign Policy event at the World Health Assembly in Geneva in May 2025. Under her leadership, Seed Global Health has helped educate more than 45,000 doctors, nurses, and midwives in seven countries, helping to improve health care for more than 76 million people. (Photo: Courtesy of Seed Global Health)

The burning of fossil fuels is linked to some 300,000 deaths in America every year, not to mention the related carbon emissions that promote global warming. Dr. Vanessa Kerry directs Global Health and Climate Policy and teaches at the Harvard T H Chan School of Public Health. She is also the World Health Organization Special Envoy for Climate Change and Health and joins Host Steve Curwood to discuss the major health costs and lost opportunities linked to pollution.

Transcript

BELTRAN: It’s Living on Earth, I’m Paloma Beltran.

CURWOOD: And I’m Steve Curwood.

Ever since the Six Cities study led by Harvard’s public health experts first found in the Nineties that coal power plant smokestacks were sources of deadly and serious health effects for people living downwind, there have been debates about what to do about it. This first research and its iterations supported by federal funds suggested as many as 70,000 Americans were dying prematurely from the tiny particles emitted. Today the most recent work led by Harvard links as many as 300,000 deaths in America every year to the burning of fossil fuels, not to mention the related carbon emissions that promote global warming. Joining us now from Boston is Vanessa Kerry, a critical care physician who directs Global Health and Climate Policy and teaches at the Harvard T. H. Chan School of Public Health. She is also the World Health Organization Special Envoy for Climate Change and Health and is speaking out about the major health costs and lost opportunities linked to pollution. Welcome to Living on Earth, Dr. Kerry!

KERRY: Thank you so much. I'm really honored to be here with you.

CURWOOD: So, there's been a shift in messaging from environmental groups regarding the impact of air pollution on environmental health. Discuss what that means in terms of the effectiveness of helping people understand the impact of the environment on their daily lives?

KERRY: Well, I think the shift in messaging that we're experiencing around the environment and climate change, the dreaded two words, I think it's twofold. It's getting very, very divided now in terms of how we think about it. I think there's a group that is trying to the calls it the greatest hoax in, you know, of our time, and there are others that are really trying to think strategically about how we understand what is happening on this earth and this planet and in our changing climate, in ways that we can really relate to that aren't just numbers or degrees Celsius, but are in the numbers of lives lost or saved, and health has been a really important piece to being able to make that transition, I think, and having people understand that you walking down the street are very well going to be impacted by what is happening, be it a moment of extreme heat, or if it, you know, and how that affects you and puts you at risk of flaring your diabetes or your lung disease or your heart disease, or in terms of understanding how extreme weather impacts us. I mean, I think when you have these massive events like the wildfires in Canada that turn the air orange in New York, it's very hard to deny that we are facing new and different challenges. And health is a very important tool to be able to do that. But I think there's another step that we can also take to help people really understand what we're up against in climate change, which is that these health impacts that we're seeing cost us money, because if you are too sick to go to work, or you can't breathe, or your child has an asthma attack, and you can't go to work because you're taking them to hospital, that's lost income. We know, for example, that the United States is losing 100 billion in productivity from extreme heat already now, and that's supposed to go to 500 billion in the next 20 years. So these, it's very real. And I think for those that can't even think about health, understanding the economic bottom line and how it affects your pocket is something that I think is universally related and understood and very real.

CURWOOD: So, let's talk about some of the research that we were told from folks at Harvard. Studies show that there are some 300,000 excess deaths in the United States each year, and maybe 7 - 8 million globally because of the fine particulate matter that's in the air due to the air pollution from the fossil fuel industry. Burning fossil fuels makes people sick. To me, it seems, if it's that much of a health danger, climate change is almost an aside. You know, you could argue about climate change, and some people want to, but that kind of health impact seems to me that people should really be acting on not burning fossil fuels just because of that. What do you think?

KERRY: So, the data on fossil fuels and what it does to our health are profound, and I think that fossil fuel burning in addition to what it is doing to the climate and extreme heat and there's a whole host of health burdens that come from what we're seeing in terms of extreme heat and the changes in weather that we're seeing that are being climate change driven. So without question, the burning of fossil fuels is driving our risk through multiple pathways. But in terms of the air pollution in the particulate matter. Particulate matter is co-emitted with the greenhouse gasses and particulate matter that is being spewed out by fossil fuels or by coal plants and the type fossil fuels that are affecting us have very direct impacts on your health. Not only do you breathe it in and can it cause issues in your lungs, but actually particulate matter 2.5 and lower, which is what is very frequently seen, is something that actually can cross into your bloodstream, lead to increased risk of heart attacks, worsen your blood pressure, increased risk of strokes, cause all sorts of other problems in the body, and it is dangerous to our health, and it is dangerous to, you know, to keep having that continue.

CURWOOD: So recently, the U.S Environmental Protection Agency said it's going to stop calculating the health care savings from key air pollution rules, things that do focus on things like particulates. What signal does that send? What's the harm from that?

KERRY: The harm of doing that, it's basically, it's really, I think it's what it's going to do, is it's undermining, without question, the general public and scientists and everyone's understanding of really how impactful the regulations and and these protections are and so what is happening ultimately, you're not measuring the cost, you're not taking in the full stock of how humans are affected, because economic savings are a major incentive for corporations and for others, individuals, to understand sort of why we can have climate action be a win-win. And so they're just removing information to be able to tell a narrative that benefits a few. But at the end of the day, we know that when you breathe air pollution and you are unable to go to work, you lose your income. Or when you have a workforce that is not able to perform because of the reduced productivity of air pollution, a company suffers. And when you're spending a huge amount of money out of pocket, or when a government is spending money, or public sector or an insurance company is spending money to provide health care to somebody who's suffering from that, we're not giving a full picture of what the harm is here. The social determinants of health are also incredibly important. So beyond the direct impacts of fossil fuels, people who are paying out of pocket for catastrophic health costs related to this are therefore losing access to nutrition, ability to send their children to school, access to other resources that are critically important. There are deep links between poverty and poor health, and we know that we're going to see upwards, you know, 44 million people are going to fall into poverty from the health impacts of climate change alone, according to the World Bank, in the next 20 years, these are really real impacts. And history is getting rewritten, and a narrative is getting rewritten when we don't provide the full picture.

CURWOOD: So if these particulates, the air pollution, has such a tremendous impact on us, health-wise and economically as well, why aren't we talking about this more in America?

KERRY: It doesn't make sense to me. I think one of the things that I'm really eager to pursue in some of the work that I'm hoping to do at Harvard School of Public Health and Department of Environmental Health is actually to look at that exact question is to help consolidate the narrative and the deep understanding of this economic bottom line of poor health and what it actually means, so that health foundationally becomes part of our conversations about economic security, human security, and to really help shift that is not treated as a social good, but understood as a powerful investment for economic growth, right? And there's lots of data out there that tells us that investments in health actually have higher returns. So the Biden administration's EPA, the very EPA that is no longer calculating the costs of climate change, has calculated that for every dollar spent in reducing PM 2.5 overall, there could be as much as $77 in health benefits. So the cost of mitigating the problem can cause profound savings in terms of people's health and well-being.

CURWOOD: To what extent are the massive impacts of air pollution on public health part of the reason that we have such a huge economic divide in this country?

KERRY: That's an interesting question. I think that, again, the social determinants of health and the degree to which we see, there's a vicious cycle that we see. And it's actually, you know, there's a term for it, the deprivation gradient, which is this fact that climate change is actually having impacts on those that are already most vulnerable in a way that it makes them even more vulnerable, because all of their social determinants are actually getting more difficult for them to achieve health, to achieve opportunity, to see economic gain, or to have, you know, the ability to sort of move upward socially in pieces like that. So when you look at who lives in urban cities, in heat deserts, where it can be absolutely crippling to live in high heat, it's often people of color or people in poverty. And so there's a massive divide that is happening where we are exacerbating inequity without question, not just in the United States, but globally. And for me, that raises the question of, are we going to accept that? Is that a sustained, not beyond just the moral sort of unacceptableness of that to me, the question also is, you know, are we, is that a sustainable pathway for humanity?

CURWOOD: We don't have much more time now, but I have to ask you about conversation that's come out of the Heritage Foundation in Washington that claims that climate change alarmism, quote, unquote, is discouraging families from having children. Now you're not only a physician, you're a mom. For a moment, speak to that issue about how concern for climate change can have the opposite effect. I mean, how dangerous is it to have that level of environmental skepticism? How cynical is it to have that level of environmental skepticism?

KERRY: Well, I mean, I think you raise a really, it's a fascinating point, but I think the real danger here isn't necessarily concern about climate change. It's really actually the perpetuation of misinformation, and the inability to kind of communicate truth and the mixed messaging that we're seeing, and we're seeing this with vaccines. We are seeing this with public health across the board, and the destruction of trust in science and health is going to be profoundly damaging, beyond just climate change, but within all scientific pieces. And I mean, I think, you know, we saw this in COVID as well. That confusion cost lives. And I saw that very, very directly as an ICU physician during COVID, when I would have patients coming in that we'd be having to put the breathing tube in, and they would be begging for the vaccine, saying, I didn't understand. I believed what everybody said, please, just give me the vaccine. And I would have to tell them it was too late. And seeing them suddenly have the dawning of what that impact of that confusion was, is what we're facing in climate change again now. And I think that my other deep concern with this is that underlying all of this chaos is actually anxiety. People have deep anxiety and mental, you know, debilitation, which is really, it is debilitating to people's ability to live their lives, care for their children, do their jobs. And we have such a stigma against mental health, we don't talk about it. But that has profound impacts on what's happening in the world today. So I think it is really an insidious sort of disease we're seeing in terms of this misinformation, and the ability for people to just live in a silo of information. And how we communicate a conversation like this, which is fact-based, scientific, ground in truth, you know, to the right places, I think, is a really critical question that we have to also again, really tackle as a society if we're going to start to help people make the right choices for the challenges that we face today.

CURWOOD: Vanessa Kerry is a critical care trained physician and Director of the Global and Climate Health Policy at the Department of Environmental Health at the Harvard T.H. Chan School of Public Health, and co-founder and CEO of Seed Global Health. Thank you so much, Dr. Kerry, for taking the time with us today.

KERRY: Thank you so much.

CURWOOD: Tune in next week for the second part of our interview with Dr. Kerry, to hear her analysis of the global health impact of Trump administration policies.

 

Links

Visit Seed Global Health’s website

Associated Press | “EPA Says It Will Stop Calculating Health Care Savings From Key Air Pollution Rules”

Frontiers in Public Health Journal | “Climate Change and Health: Rethinking Public Health Messaging for Wildfire Smoke and Extreme Heat Co-Exposures”