Mexico has become the first developing country to sign binding climate change targets into law.
According to President Felipe Calderon, the law will set targets for reducing greenhouse gas emissions and increase the use of renewable energy in Mexico.
Mexico is committed to reducing greenhouse gas emissions by 30 percent by 2020 and by 50 percent by 2050, Calderon said in a tweet.
This law is part of all the efforts that have made Mexico an international leader in environmental protection.
In 2008, the UK government pledged to cut greenhouse gas emissions by 50 percent by 2050.