National Coordinator of the first Earth Day, Hayes has been at the core of the modern environmental movement since its launch. As a foundation president, attorney, lobbyist, Stanford professor, grassroots organizer, and the youngest director of a national laboratory in the nation's history, he has spent much of his life fighting for a healthier world.
Selected by Time magazine as one of its 100 "Heroes for the Planet," Denis Hayes has been awarded the highest awards offered by the Sierra Club, National Wildlife Federation, Natural Resources Council of America, American Solar Energy Society, and the Humane Society of the United States.
Most recently, in his role as President of the Bullitt Foundation, he initiated and led a project to design and build the Bullitt Center – a path-breaking innovative structure that many are calling "the greenest commercial building in the world."
Hayes is the author of three books. His most recent, Cowed: The Hidden Impact of 93 Million Cows on America's Health, Economy, Politics, Culture, and Environment, shows how raising and eating cattle has depleted America's largest aquifer, created health problems, and drastically increased methane discharges (a very powerful greenhouse gas). Cowed explains why eating one pound of beef produces a greater carbon footprint than burning a gallon of gas.
He speaks about the major environmental challenges and opportunities confronting us – global warming, expanding renewable energy, green building, sustainable food, protecting our oceans and natural resources – and about the roles we can all play in ensuring that our kids will have a sustainable future.
National Coordinator of the first Earth Day, Hayes has been at the core of the modern environmental movement since its launch. As a foundation president, attorney, lobbyist, Stanford professor, grassroots organizer, and the youngest director of a national laboratory in the nation's history, he has spent much of his life fighting for a healthier world.
Selected by Time magazine as one of its 100 "Heroes for the Planet," Denis Hayes has been awarded the highest awards offered by the Sierra Club, National Wildlife Federation, Natural Resources Council of America, American Solar Energy Society, and the Humane Society of the United States.
Most recently, in his role as President of the Bullitt Foundation, he initiated and led a project to design and build the Bullitt Center – a path-breaking innovative structure that many are calling "the greenest commercial building in the world."
Hayes is the author of three books. His most recent, Cowed: The Hidden Impact of 93 Million Cows on America's Health, Economy, Politics, Culture, and Environment, shows how raising and eating cattle has depleted America's largest aquifer, created health problems, and drastically increased methane discharges (a very powerful greenhouse gas). Cowed explains why eating one pound of beef produces a greater carbon footprint than burning a gallon of gas.
He speaks about the major environmental challenges and opportunities confronting us – global warming, expanding renewable energy, green building, sustainable food, protecting our oceans and natural resources – and about the roles we can all play in ensuring that our kids will have a sustainable future.
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American Water Works Association
In situ
T.W., Director of Technical Programs, American Water Works Association
Denis Hayes was a superb choice to open our annual conference! As a somewhat unusual choice for us, some of our leadership was nervous about what he would say, but Denis was a huge success. His gravitas from a lifetime working for a sustainable planet, coupled with his understated delivery and wry humor, hit all the right chords. We heard nothing but positive comments about how well his talk was received, and it set a great tone for the whole conference.
Mercyhurst College
In situ
C.J.M., Chair, Department of History, Mercyhurst College
Denis Hayes is a rare environmental speaker. His lecture delivered the extraordinary combination of moral authority, intellectual depth, and incisive wisdom that comes from his more than four decades of wide-ranging work at the local, national and global levels. He is at once thoughtful, cogent, methodically persuasive, and deeply moving. I have heard nothing but rave reviews from students and colleagues alike... one of the most meaningful and memorable days in my eleven years at Mercyhurst College.
Kenexa
In situ
B.E., Executive Vice President, Kenexa
The calm, clear, credible words of Denis Hayes provide an understated background for the powerful call to action that is implicit in his message. He talks with the authority of someone who has not only lived this message, but also cared enough to master the scientific disciplines and understand the complex interactions that must be considered as we learn how to live in greater harmony with our planet. He talks honestly about the potential devastation that may await us if we fail but it is his optimistic message of hope and progress that captures the imagination and invites the participation of his audience.
Adjunct Professor, University of Chicago Booth School of Business
In situ
T.B., Managing Partner, Atlas Capital Investments, Adjunct Professor, University of Chicago Booth School of Business
Denis Hayes is a rare speaker - experienced, thoughtful, critical, caring, and challenging. In the complex and frustrating world of environmental issues, it is often easier to give up and check out. Denis regularly denies us that option and gives us the energy and insight to move ahead.
SunEdison
In situ
J.S., Founder, SunEdison
Your speech was integral to making our recent Creating Climate Wealth conference a wild success. Your message of hope and inspiration is a beacon for our industry. As you said in your speech, we now have assembled enough talent, venture capital, commitment, and drive to make your dream of 30 years ago come true.
Kenexa
In situ
N.D., World Conference Manager, Kenexa
We can't tell you enough how much we enjoyed having Denis at our conference. We kept hearing from people that it was the best message they've ever heard.
Mercyhurst College
In situ
D.M.P.D.., Co-Director, The Evelyn Lincoln Institute for Ethics and Society, Mercyhurst College
Mr. Hayes gave an extraordinarily thoughtful presentation that included a breadth and depth of information that was simply stunning. Moreover, this was conveyed in deeply human terms that were sympathetic to complexities of environmental problems. I would highly recommend him to anyone.



