In the absence of an atmosphere, Earth’s surface temperature would be about –18°C, or 0°F, which is way too cold for life. Greenhouse gases have just the right molecular structure to absorb infrared radiation that the Earth emits. It re-emits most of that infrared energy in all directions, warming the atmosphere to its comfortable average temperature of 15°C (60°F). So the greenhouse effect is a good thing.
<span>President Richard Nixon became the first U.S. president to visit Moscow in May 1972</span>
Answer:
I'm 99% sure it's answer D state
Explanation:
True sit ins were used as a form of protest during the civil rights movement.
I believe the term is depression.
