Greenhouse gases

According to scientists, the average temperature of Earth would drop from 14˚C (57˚F) to as low as –18˚C (–0.4˚F), without the greenhouse effect.

Methane is released naturally from decomposition.

Most of the CO2 that people put into the atmosphere comes from breathing.

People add methane to the atmosphere through livestock farming, landfills, and fossil fuel production such as coal mining and natural gas processing.

Nitrous oxide comes from industries..

As the level of these gases rises, so does the temperature of Earth.