The is a natural process in which certain gases in the atmosphere trap heat near earth and prevent it from radiating back into soace

The Greenhouse Effect is the natural process which traps heat on the surface of the Earth and prevents it from being radiated back to space. The "certain gasses" involved in this process are: carbon dioxide (CO2), methane (CH4), nitrous oxide (N20), and fluorinated gasses. 

B. to study the spatial patterning of forests and forests fires and plan for better use of fire fighting resources in the u.s.

Ones bigger then than the other