Global Warming ~

An online crossword puzzle with 7 words. Play it free at AgileCrosswords.com.

Clues

a natural resouce that cannot be reproduced
the process which certain gases in earth's atmosphere that trap energy from the sun
anything that is provided by nature
energy that comes from natural resource
types of gas that cause the greenhouse effect
a gradual increase in the average temperature of earth
a broader term that refers to long term changes in clikmate including average temperature