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.

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 117651 signatures
Number Date Name Location
117651 Sat Oct 01 11:29:19 EDT 2016 Mary Rothbart Eugene, OR , US
117650 Fri Sep 30 14:48:25 EDT 2016 Ana Naumovska Skopje, ot , MK
117649 Fri Sep 30 04:30:35 EDT 2016 Neville Bruce Anchorage, AK , US
117648 Thu Sep 29 20:38:41 EDT 2016 Kimberly Kerrigan Pensacola , FL , US
117647 Thu Sep 29 00:34:12 EDT 2016 Merryl Lentz California, CA , US
117646 Tue Sep 27 22:49:43 EDT 2016 Anonymous Indianapolis, IN , US
117645 Mon Sep 26 21:55:46 EDT 2016 Anonymous Austin, TX , US
117644 Sat Sep 24 17:31:13 EDT 2016 Jacqueline O'Connor Sierra Vista, CA , US
117643 Sat Sep 24 13:17:21 EDT 2016 David Ramirez Sugar Land , TX , US
117642 Fri Sep 23 23:24:37 EDT 2016 Merryl Lentz California, CA , US
117641 Thu Sep 22 23:57:25 EDT 2016 Jerri Jarvis PA, PA , US
117640 Thu Sep 22 21:48:07 EDT 2016 Gene and Dori Peters Sun City, AZ , US
117639 Thu Sep 22 06:10:44 EDT 2016 Audrey Farrelly London , ot , GB
117638 Wed Sep 21 17:06:10 EDT 2016 Andrew Sulay Dnipropetrovsk, ot , UA
117637 Wed Sep 21 16:32:47 EDT 2016 Kelly Lund Malmö, ot , SE
117636 Wed Sep 21 12:34:10 EDT 2016 abby grayburn ny, NY , US
117635 Tue Sep 20 14:52:26 EDT 2016 ATHANASIOS PSICHOGIOS METAMORFOSSI, ot , GR
117634 Tue Sep 20 06:15:48 EDT 2016 Eileen Wunderlich Houston, TX , US
117633 Tue Sep 20 00:23:43 EDT 2016 Anonymous Lakewood, CO , US
117632 Sun Sep 18 11:41:03 EDT 2016 Debbie Neimark Chicago, IL , US
117631 Sat Sep 17 17:43:37 EDT 2016 Fernando Pueblo San Diego, CA , US
117630 Sat Sep 17 17:07:21 EDT 2016 Alisa Adobajor Moscow, ot , RU
117629 Fri Sep 16 00:17:11 EDT 2016 LaDonna Ballard Ok, OK , US
117628 Thu Sep 15 12:00:32 EDT 2016 Diane Hayward BC, BC , CA
117627 Thu Sep 15 06:18:57 EDT 2016 Guy Graham Jersey City, NJ , US
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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.

Smokestacks photo courtesy NASA.