"Life on Earth depends on energy from the sun. That heat warms the surface of the planet, and some of it goes back into the atmosphere. Certain gases, especially carbon dioxide, trap that heat, creating the greenhouse effect. There is an overwhelming scientific consensus that human activity, most notably the burning of fossil fuels, has produced anthropogenic global warming, a continuing rise in the average temperature of our climate system above what would be happening absent human activity."

http://www.telesurtv.net/english/opinion/Dealing-with-Climate-Change-Deniers-20151006-0026.html