Some Environmental Scientists Think That Global Warming Will Lead to an Even

Some environmental scientists think that global warming will lead to an even greater increase in the amounts of carbon dioxide in the atmosphere. This would most likely be due to

A) increased use of air conditioners.
B) developing nations maturing into developed nations, thereby increasing use of fossil fuels.
C) more people driving to cooler regions to escape the heat.
D) decreases in the protective ozone layer surrounding the Earth.
E) melting of the polar ice caps and thawing of large regions of permafrost.