the correct answers are People depend on the atmosphere for the air they breathe. It screens out the sun's ultraviolet rays. Warm air has more moisture content than cool air.
X would equal 5. (need more characters)
Urbanization with increased medical facilities, DTM stage 3.
When the temperature rises the ice in antarctica will melt causing the sea levels to rise. I think that is the answer. hope it helped
Less dense then water its self