-There are four major greenhouse gases; the most popular is carbon dioxide, water vapor, methane, and nitrous oxide.

-Greenhouses retain heat and the greenhouse effect is the earth’s way of retaining heat.

-Ultraviolet and infrared rays are the two heat-conducting rays from the sun that heat up the earth’s atmosphere. To see a diagram of these two rays and how they are retained,

-Population is increasing tremendously each year; with a larger population there is a larger amount of carbon dioxide emissions.

-Factories and growing industries also increase many greenhouse gases.

-Population decrease and constant demand for more land has cut down many resources that take in greenhouse gases.

-To see a fully animated diagram of the greenhouse effect,