Sacramento Bee: California's fledgling cap-and-trade carbon market is becoming more familiar to the companies that have to participate in it – and that's showing up in the price they're paying for the right to pollute.
Carbon emission allowances sold for $13.62 a ton this week during the state's second-ever carbon auction, the California Air Resources Board reported Friday.
The price at Tuesday's auction was considerably higher than the first state-run sale last November, when carbon sold for barely above...