About Us Global Warming is the phrase people use when they talk about how earth s average temperature increases because of the buildup of greenhouse gases in the atmosphere. Carbon monoxide and methane are two types of greenhouse gas.
Greenhouse gases prevent heat energy from the sun escaping into space.
This greenhouse effect makes the earth warmer. As more and more greenhouse gases are released into the atmosphere the earth gets warmer and warmer. If the earth gets to hot, cities and towns near oceans and lakes may experience flooding. Some parts of the world might also experience major changes in the weather.