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
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1-25 of 117680 signatures
Number Date Name Location
117680 Mon Oct 24 13:49:28 EDT 2016 Dat Tran Upper Darby, PA , US
117679 Sun Oct 23 01:46:38 EDT 2016 Jennifer Parramore San Diego, CA , US
117678 Sat Oct 22 19:36:12 EDT 2016 Laurel Van Horn Culpeper, VA , US
117677 Sat Oct 22 12:46:00 EDT 2016 Katherine Connor-McKee Shelby, NC , US
117676 Sat Oct 22 11:42:41 EDT 2016 Anonymous Sacramento, CA , US
117675 Sat Oct 22 04:51:41 EDT 2016 Robyn Blaisdell Makawao, HI , US
117674 Sat Oct 22 00:32:12 EDT 2016 Robert Burger Corvallis, OR , US
117673 Fri Oct 21 17:27:38 EDT 2016 Peter McNelly MO, MO , US
117672 Fri Oct 21 14:59:56 EDT 2016 Annie Bruno Farmingville, NY , US
117671 Fri Oct 21 13:46:07 EDT 2016 Prairie Moser Bandon, OR , US
117670 Fri Oct 21 13:31:40 EDT 2016 Jennifer Faulkner Rocky point , NY , US
117669 Fri Oct 21 13:09:11 EDT 2016 Laura Bentzen Sterling, VA ,
117668 Fri Oct 21 08:55:26 EDT 2016 Nicole Loh Mayville, WI , SG
117667 Thu Oct 20 19:03:05 EDT 2016 Dobi Dobroslawa estero, FL , US
117666 Thu Oct 20 14:31:10 EDT 2016 Lara Tishler San Francisco, CA , US
117665 Tue Oct 18 21:28:20 EDT 2016 Vasileios Grigoriou Liverpool, GB+28 , GB
117664 Mon Oct 17 19:51:22 EDT 2016 Charles Kubricht Austin, TX , US
117663 Mon Oct 17 14:25:08 EDT 2016 Bill Azevedo AZ, AZ , US
117662 Mon Oct 17 13:51:42 EDT 2016 Janet Abbondante FL, FL , US
117661 Mon Oct 17 13:48:22 EDT 2016 Perry Gx CA, CA , US
117660 Fri Oct 14 01:45:07 EDT 2016 Claire Chambers CA, CA , US
117659 Thu Oct 13 19:52:51 EDT 2016 Lynn Boulton Lee Vining, CA , US
117658 Tue Oct 11 03:59:29 EDT 2016 Kenneth MagaƱa apo, CA , US
117657 Mon Oct 10 18:39:02 EDT 2016 Christopher Porter Wallasey, ot , GB
117656 Mon Oct 10 16:20:33 EDT 2016 Bridget Bailey Stafford, VA , 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.