Did you know?
If it were not for naturally occurring greenhouse gases, the earth would be
too cold to support life as we know it. Without the greenhouse effect, the
average temperature of the earth would be about
-2°F rather than the 57°F we currently experience.
Many chemical compounds found in the earths atmosphere act as greenhouse gases. When sunlight strikes the earths surface, some of it is reradiated back toward space as infrared radiation (heat). Greenhouse gases absorb this infrared radiation and trap its heat in the atmosphere.
Many gases exhibit these greenhouse properties. Some gases occur naturally. Some gases are produced by human activities, and some, such as industrial gases, are exclusively human made.