The United Nations has meetings where world leaders agree on what to do about global warming.
Every five years, the Earth Summit happens.
In 1997 there was an Earth Summit in Rio de Janeiro and in 1997, an agreement was made at the UN Conference on Climate Change in Kyoto, Japan, to cut the amount of gases that industries make.
Leaders agree the world can cut the amount of carbon dioxide that's released into the atmosphere by changing the way power is produced too.
In February 2003, the British Government set out its plans to produce electricity using "greener" ways.