President Obama signed a bill this week protecting U.S. airlines from an emission tax when they fly in and out of Europe. The EU's carbon tax is so unpopular, it's been suspended for all carriers for a year.
Six years after enacting its own law to fight global warming, California conducts its first auction of carbon permits. Companies that give off large amounts of carbon dioxide will need permits to cover the emissions.
Google's quarterly earnings report was mistakenly released while markets were open, instead of after. A 20 percent drop in profits, as prices of online and mobile ads decline, sent shares down immediately.