In 2009, when carbon dioxide (CO2) levels were at 387.43 parts per million, the Center for Biological Diversity and 350.org submitted a citizen petition calling on the U.S. Environmental Protection Agency to take steps necessary to institute a national ambient air quality standard (NAAQS) for greenhouse gas (GHG) emissions under §§108-110 of the Clean Air Act (CAA). For 12 years, the petition was simply ignored. Then, the day President Donald Trump left office, outgoing EPA Administrator Andrew Wheeler issued a letter denying the petition.

Despite existing laws, communities across the United States are exposed to dangerous environmental conditions that can have devastating effects on public health. One emerging mechanism to address these issues are “green amendments,” self-executing provisions added to a state constitution that recognize and protect the rights of all people, including future generations, to pure water, clean air, and a stable climate.