The state's dramatic, difficult aim

The good news is that California cut the greenhouse gases it pumped out in 2017 by an amount equal to roughly 5 million metric tons of carbon dioxide, according to the latest numbers from the California Air Resources Board. That’s about a 1 percent decrease over the previous year, and it makes 2017 the second year that California beat an imminent goal to reduce greenhouse gases to 1990 levels by 2020. 

The bad news is that the state has to almost triple those cuts going forward for California to meet its next ambitious goal: slashing greenhouse gases by another 40 percent by 2030.