California's climate change policy was initially instigated by ex-Governator Arnold Schwarzenegger. Governor Jerry Brown and other senior lawmakers had included the proposal in a climate change bill, but were forced to retreat amid growing opposition.
State senate leader Kevin de Leon, who supported the cut, accused oil firms of deploying "scare tactics". The leaders have vowed to push ahead with other reforms, including boosting renewable electricity use. The plans to require a 50% reduction in petroleum use in motor vehicles by 2030 were met with fierce opposition from business groups and oil companies, who warned of negative consequences for California's economy. California is the second-biggest producer of carbon dioxide from burning fossil fuels among US states.
http://www.bbc.com/news/world-us-canada-34208050 [bbc.com]