The Greenhouse Effect, Which Has Become a Major Ecological Concern

Multiple Choice

The greenhouse effect, which has become a major ecological concern, is caused by

A) the increase in atmospheric concentrations of greenhouse gases (CO₂,CH₄, and N2O) .
B) overuse of fertilizers in farming.
C) the release of heat energy from burning fossil fuels.
D) the destruction of ozone in the upper atmosphere.
E) global warming.