Airlines say they must go carbon-neutral to satisfy consumers and avoid harsh regulations. Biofuels can get the industry partway there, but it will also require technological breakthroughs.
California won't be able to meet its targets at its current pace of pollution reduction. Here are three actions state officials can take in the next year to pick up the pace.
Stocks fell broadly Tuesday on Wall Street as new data showing that inflation is still running high put a spotlight on what action the Federal Reserve will take as it holds its last meeting of the year.