People's Petition to Cap Carbon Dioxide Pollution at 350 Parts Per Million
Center for     Biological     Diversity   

People's Petition to Cap Carbon Dioxide Pollution at 350 Parts Per Million


Prominent climate researchers have warned that we must reduce the level of atmospheric carbon dioxide to 350 parts per million (ppm) or below in order to stabilize climate change and avoid global catastrophe. The Center for Biological Diversity, along with Bill McKibben's group, is advocating strongly for this necessary standard.

While carbon dioxide isn't the only global warming pollutant we need to control, it's the number-one contributor to climate change.

Please join us in moving toward a real solution to the climate crisis by calling on the U.S. Environmental Protection Agency to do its job as science, the law and common sense require.

Sign the People's Petition to Cap Carbon at 350 Parts Per Million today.

Several lines of evidence show that allowing atmospheric carbon dioxide levels to remain above 350 ppm for a sustained period of time will lead to dangerously acidic oceans, runaway global warming, and melting of the polar ice caps. Such a climate would be well outside anything experienced in the history of the human species, and would carry with it irreversible cascades of species extinctions and significant dangers for human civilization.

What's needed is an immediate reduction of atmospheric carbon dioxide, with the goal of an overall concentration of 350 ppm or less to be achieved as quickly as possible. To accomplish that, the Center supports the rapid phasing out of all coal-fired power plants; the highest technologically feasible vehicle-mileage standards; and a ban on extreme energy development like Arctic drilling, tar sands and fracking, among other critical measures.

I support the legal petition filed by the Center for Biological Diversity and to the EPA to cap atmospheric carbon dioxide levels at 350 parts per million -- the level science says is necessary to avoid the worst impacts of global warming -- under the Clean Air Act.

For four decades, the Clean Air Act has protected the air we breathe through a proven, successful system of pollution control that saves lives and creates economic benefits exceeding its costs by many times. It's time to fully use one of our strongest existing tools for reducing greenhouse gas pollution: the Clean Air Act.

Now is the time to enforce the Act, not gut it. I urge you to move swiftly to grant the petition and enforce the Clean Air Act.


Dr. James Hansen, Climate Scientist
Bill McKibben, Founder, Author
Ed Begley, Jr., Activist /Actor
Bonnie Raitt, Musician / Activist
Barbara Kingsolver, Author
Doug La Follette, Wisconsin Secretary of State
Dr. Helen Caldicott, Anti-Nuclear Activist
ChiQ Simms, Navigation Foundation
Dr. Michael Dorsey, Director- Sierra Club National Board
Brock Evans, President- Endangered Species Coalition
Dinah Bear, Attorney-at-Law
Curtis Moore, Author and former Republican Counsel, Committee on Environment and Public Works, U.S. Senate
Dr. Thomas Lovejoy, Biodiversity Chair, Heinz Center
Dr. Niles Eldredge, Curator in the Department of Invertebrates, American Museum of Natural History
Dr. John Terborgh, Research Professor Emeritus and Director, Center for Tropical Conservation, Duke University
Jonathan Baker, Co-founder, Sol Sage
Joshua Beckman, Poet
Kate Bernheimer, Author
Elise Blackwell, Author
Adam Braver, Author
Alan Cheuse, Author
Ron Currie, Jr., Author
Kathryn Davis, Author
Alison Deming, Author
Jay Driscoll, of band Barefoot Truth
Rikki Ducornet, Author
Ben Edlund, TV Writer and Comic-book Artist
Jennifer Egan, Author
Daniel Handler, Author
Oliver Houck, Author and Professor of Law, Tulane University
Alex Irvine, Author
Anna Lappe, Author, Small Planet Institute
Jonathan Lethem, Author
Victor Lodato, Author
Alec Loorz, Founder, Kids vs. Global Warming
Victoria Loorz, Co-Founder, Kids vs. Global Warming
Ben Marcus, Author
Lydia Millet, Author
Rick Moody, Author
Jenny Offill, Author
Zyg Plater, Professor of Law, Boston College Law School
Dr. Melissa Savage, Professor Emeritus, University of California Los Angeles
Aurelie Sheehan, Author
Darcey Steinke, Author
Darin Strauss, Author
Donna Tartt, Author
Lynne Tillman, Author
Fred Tomaselli, Artist
Harvey Wasserman, author of SOLARTOPIA! Our Green-Powered Earth, A.D. 2030
Don Waters, Author
Eric Zencey, Visiting Associate Professor of Historical and Political Studies, Empire State College
Luanne Rice, Author
Mike Tidwell, Director, Chesapeake Climate Action Network
Optional Member Code

1-25 of 111128 signatures
Number Date Name
111128 Tue Dec 12 09:02:05 EST 2017 Matt Maras
111127 Tue Dec 12 09:00:16 EST 2017 Matt Maras
111126 Sun Dec 10 22:22:07 EST 2017 Jeanine Ten Broeck
111125 Sun Dec 10 19:30:13 EST 2017 Mary Jeffrey
111124 Sat Dec 09 23:53:40 EST 2017 Teri German
111123 Fri Dec 08 22:31:48 EST 2017 elizabeth myrin shore
111122 Fri Dec 08 04:02:05 EST 2017 D. Wiese Jones
111121 Thu Dec 07 18:17:20 EST 2017 Janice Banks
111120 Thu Dec 07 15:40:35 EST 2017 Kerri Bisner
111119 Wed Dec 06 20:48:33 EST 2017 Sara Thole
111118 Mon Dec 04 17:40:14 EST 2017 Nicole Loh
111117 Mon Dec 04 17:38:22 EST 2017 Nicole Loh
111116 Mon Dec 04 17:27:48 EST 2017 Nicholas Lee
111115 Mon Dec 04 17:26:43 EST 2017 Nicholas Lee
111114 Mon Dec 04 13:45:26 EST 2017 Karrie Kozak
111113 Mon Dec 04 11:55:32 EST 2017 dawn king
111112 Sun Dec 03 18:21:05 EST 2017 Cara Blazucki
111111 Sun Dec 03 18:04:19 EST 2017 g m
111110 Sun Dec 03 04:24:24 EST 2017 Anonymous
111109 Sat Dec 02 14:08:13 EST 2017 Robin Wilson
111108 Sat Dec 02 05:51:44 EST 2017 Berry Berkel
111107 Thu Nov 30 22:04:05 EST 2017 Jen Lockett
111106 Thu Nov 30 17:59:02 EST 2017 Isaiah Smith
111105 Thu Nov 30 17:35:32 EST 2017 Alice Clark
111104 Thu Nov 30 16:12:37 EST 2017 Erin Enger
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Please take action by Jan. 15, 2018.

Photo of smokestack courtesy NASA.

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