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 111019 signatures
Number Date Name
111019 Sun Sep 17 15:37:58 EDT 2017 Sigfrido Losada Torreiro
111018 Sat Sep 16 22:32:17 EDT 2017 kathleen van every
111017 Sat Sep 16 21:01:02 EDT 2017 kenneth magaña
111016 Sat Sep 16 10:21:43 EDT 2017 Mary Dohaney
111015 Fri Sep 15 21:53:39 EDT 2017 Seb Villani
111014 Fri Sep 15 11:14:31 EDT 2017 Mary Lang
111013 Mon Sep 11 18:27:16 EDT 2017 CADEE MURRAY
111012 Mon Sep 11 18:24:32 EDT 2017 CADEE MURRAY
111011 Thu Sep 07 13:28:07 EDT 2017 Sheila Sykes-Gatz
111010 Thu Sep 07 13:20:24 EDT 2017 Sheila Sykes-Gatz
111009 Wed Sep 06 14:04:48 EDT 2017 Katy Kotiadis
111008 Mon Sep 04 16:19:20 EDT 2017 Theresa Fassett
111007 Mon Sep 04 16:19:17 EDT 2017 Theresa Fassett
111006 Mon Sep 04 12:15:23 EDT 2017 Mia Haugan
111005 Tue Aug 29 03:03:17 EDT 2017 JUNE CAMPBELL
111004 Tue Aug 29 00:52:43 EDT 2017 Stacie Groll
111003 Fri Aug 25 11:58:06 EDT 2017 Stephanie Tunic
111002 Thu Aug 24 08:32:25 EDT 2017 Alyssa Snowden
111001 Wed Aug 23 20:59:45 EDT 2017 John Palafoutas
111000 Wed Aug 23 19:25:34 EDT 2017 Arthur Haynes
110999 Mon Aug 21 22:52:20 EDT 2017 Kristina Bonilla
110998 Fri Aug 18 02:07:20 EDT 2017 Paul Keough
110997 Thu Aug 17 08:30:22 EDT 2017 Matt Maras
110996 Tue Aug 08 13:00:55 EDT 2017 Johnna Irwin
110995 Sun Aug 06 16:24:05 EDT 2017 Jamie Guy
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Please take action by Jan. 15, 2018.

Photo of smokestack courtesy NASA.

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