The massive energy bill that would set a cap on carbon dioxide emissions and provide other incentives and requirements for clean energy has passed the U.S. House of Representatives by a slim margin.

It's far from becoming law, though. Passing the bill in the Senate will be more difficult: many Democrats voted against the bill in the House, something that can't happen in the Senate if it is to pass. What's more, President Obama isn't entirely happy with the bill and will be pushing to get some changes made, including removing a provision designed to encourage other countries to set up emissions goals of their own, according to the Washington Post.

Some experts hope that the bill's passage in the House will prove a strong bargaining chip later this year when world leaders meet to discuss international caps on emissions.