A bill coauthored by Assemblymember Das Williams that aims to reduce atmospheric methane, hydrofluorocarbons, and soot — all of which are relatively short-lived but have even higher global warming potential than CO2 — was signed into law 9/19 by Gov. Jerry Brown. Under SB 1383, which was introduced following the Paris climate change summit, emissions of soot pollutants would be reduced by 50 percent from 2013 levels by 2030. Methane emissions from dairy farms would be subject to a 40 percent reduction in the same time period.
