n ______, Congress approved the Food Safety Modernization Act to ensure that the U.S. food supply is safe.

Out of the __________ presidents who were impeached by the House, __________ was the only one to resign

Fill in the blank with correct word

The amount of energy from the Sun that the Earth reflects relative to the amount it absorbs is what scientists refer to as ______.

A. the greenhouse effect B. radiative forcing C. feedback mechanisms D. global warming