Many scientists believe that the current period of global warming is related to increased levels of .
a. nitrogen in the earth's atmosphere.
b. radon being released from the earth's soil.
c. carbon dioxide in the earth's atmosphere.
d. hydrogen in the outermost layer of the earth's atmosphere.

Who came up with the theory of evolution

According to the united nations refugee agency, more than 2/3 of the world's refugees come from just five countries. which country is not on that list? a) turkey b) myanmar c) afghanistan d) south sudan

According to a recent survey, the local government wants to classify people according to their income earning capacity. they want to do so in order to provide special facilities for the poor. who among the four individuals will be classified as poor? a. joseph earns $2.25 per day b. maria earns $1.50 per day c. rosita earns $2.00 per day d. tim earns $ 1.00 per day