GREEN HOUSE GASES
Greenhouse gases come from all sorts of everyday activities, such as using electricity, heating our homes, and driving around town. The graph to the right shows which activities produce the most greenhouse gases in the United States.
These greenhouse gases don’t just stay in one place after they’re added to the atmosphere. As air moves around the world, greenhouse gases become globally mixed, which means the concentration of a greenhouse gas like carbon dioxide is roughly the same no matter where you measure it. Even though some countries produce more greenhouse gases than others, emissions from every country contribute to the problem. That’s one reason why climate change requires global action. The graph below shows how the world’s total greenhouse gas emissions are continuing to increase every year.