Emissions from so - called " super pollutants " could be slashed by a new California Air Resources Board strategy that targets " short - lived environmental pollutants " including methane from cow manure , hydrofluorocarbons(HFCs ) from refrigerators and black carbon from diesel exhaust . These remain in the atmosphere for much less time than expected , but are much more potent . Democratic State Senator Ricardo Lara , who recently chaired the regulatory board , said the plans , which aim to cut methane and HFCs to 50 % below 2013 levels , and black carbon to 50 % below 2013 limits , were " truly groundbreaking " . Dairy farmers criticised the scheme , claiming they lacked the oil industry 's flexibility to cut emissions .
Emissions from so-called "super pollutants" could be slashed by a new California Air Resources Board strategy that targets "short-lived climate pollutants" including methane from cow manure, hydrofluorocarbons(HFCs) from refrigerators and black carbon from diesel exhaust. These stay in the atmosphere for much less time than CO2, but are much more potent. Democratic State Senator Ricardo Lara, who recently joined the regulatory board, said the plans, which aim to cut methane and HFCs to 40% below 2013 levels, and black carbon to 50% below 2013 limits, were "truly groundbreaking". Dairy farmers criticised the scheme, claiming they lack the oil industry's flexibility to cut emissions.