Proposition 23 is a ballot measure that aims to suspend implementation of air pollution control law—AB 32.
In 2006, the California State Legislature and Governor Arnold Schwarzenegger enacted an environmental law, AB 32, (also known as the Global Warming Solutions Act of 2006) which requires greenhouse gas emissions in the state be cut to the levels that they were in 1990—(approx. 427 million metric tons of carbon dioxide equivalent (MMTCO2e) by 2020.