is crucial for life on earth it holds the temperature about thirty degrees warmer than if there were no there was no atmosphere at all that s the greenhouse. gases carbon dioxide and water it also provides of course the oxygen that we breathe and the carbon dioxide that drives photosynthesis together with the sun. if that rated sea water moves through the atmosphere before it reaches the mainland . this is the voices cycle. when you look at the earth out this fear from space from the space station you see this thin blue line on the curve of this one hundred you experience when you realize how important it is for us to continue on earth and how tell us it s just held down by gravity what if it were to just disappear in