By the mid 1700's, there were over people living in the 13 American Colonies.
A. 2.5 million
B. 250 thousand
C. 500 thousand

What do most climatologists see as a major cause of rising global temperatures? a. earth's closer proximity to the sun due to its gravitational pull b. greenhouse gases produced by burning fossil fuels c. rising ocean levels caused by melting polar ice sheets d. water pollution cause by industrial waste