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 117743 signatures
Number Date Name Location
117743 Fri Dec 02 01:28:44 EST 2016 Lori Gasser Hermitage, TN , US
117742 Wed Nov 30 12:28:46 EST 2016 Alex Tsukernik Brooklyn, New York , US
117741 Tue Nov 29 20:45:43 EST 2016 Sophie Swirczynski Eugene, OR , US
117740 Fri Nov 25 16:43:45 EST 2016 Fernando Pueblo San Diego, CA , US
117739 Fri Nov 25 15:14:25 EST 2016 Alisa Adobajor Moscow, RU+48 , RU
117738 Thu Nov 24 04:07:54 EST 2016 James Sullivan Chicago, IL , US
117737 Tue Nov 22 23:09:05 EST 2016 Michelle Logan Florida, FL , US
117736 Tue Nov 22 20:35:45 EST 2016 Jason Patnode Stateline, NV , US
117735 Mon Nov 21 22:04:03 EST 2016 Alice Henderson Zephyr Cove, NV , US
117734 Sun Nov 20 21:20:37 EST 2016 Dawn Hostetler Phoenix, AZ , US
117733 Sat Nov 19 13:04:59 EST 2016 ruth reynolds oak view, CA , US
117732 Sat Nov 19 12:11:53 EST 2016 Anonymous CUMBERLND CTR, ME , US
117731 Fri Nov 18 16:34:20 EST 2016 A Martin Texas, TX , US
117730 Fri Nov 18 15:04:07 EST 2016 Quentin Fischer Roanke, VA , US
117729 Fri Nov 18 11:53:38 EST 2016 Jere Wilkerson Monterey, CA , US
117728 Thu Nov 17 17:02:21 EST 2016 Sayre Weaver Laguna Woods, CA , US
117727 Thu Nov 17 07:28:34 EST 2016 Angelica Chinellato Monthey, CH+22 , CH
117726 Wed Nov 16 16:48:50 EST 2016 Georgia Conroy Tucson, AZ , US
117725 Tue Nov 15 11:07:28 EST 2016 kenneth clark rochester, NY , US
117724 Mon Nov 14 15:49:02 EST 2016 Alima Lindsey Colorado Springs, CO , US
117723 Mon Nov 14 01:40:21 EST 2016 Anonymous Virginia Beach , VA , US
117722 Sun Nov 13 02:30:19 EST 2016 Claire Chambers CA, CA , US
117721 Sat Nov 12 14:23:42 EST 2016 Lisa Burns Ballwin, MO , US
117720 Sat Nov 12 13:52:51 EST 2016 kenneth clark rochester, NY , US
117719 Fri Nov 11 22:39:07 EST 2016 Tessa Love Oakland, CA , 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.