Oxygen levels would increase
With no atmosphere, there would be no "twilight". Twilight is caused by the scattering of sunlight in the atmosphere. With no atmosphere, you'd go from "day" to "night" with nothing in between.
People think it is a major concern mainly because it "IS" a major concern for those of us who would like to keep breathing the oxygen in earths atmosphere, and for those who would like their grand children to have free oxygen available via the earths biosphere.
Unfortunately at that period of time, there will be no one to look, as all life would have been killed off billions of years ago. Also, because of the immense heat, there would be no atmosphere. The Sun at noon, would fill almost the entire sky and the glare would be blinding, along with the heat which would be scorching to say the least. At sunrise and sunset, the sky would be black, as there would be no atmosphere to bend light and give that "nice" blue colour we see in the sky today. See related link for a picture of what the Sun would look like as a red giant.
To fully escape earths gravity you would have to travel outside of this star system. While outside of our atmosphere you most certainly would feel a lot less of the effects of gravity, you would still be affected by it. Sincerely, Anon Ø
They cool down when they combine carbon dioxid and atmosphere.
we would die
youll die
The Earths surface would be much colder than it is.
We would not exsist, because it would be too hot. Also, the earth would be a burnt piece of rock.
Yes, 80% of the Earths atmosphere is made up of nitrogen.
Earths atmosphere dose have oxygen in it, without it we would all be dead we require oxygen to breathe.
The atmosphere
If there were no atmosphere, there would be no plants and animals.
The Earth would start to heat up and the ocean would evaporate.
There would be a larger population of algae on the earth.
A+ Meteorology :D
The earth's atmosphere is what we must breath or we would suffocate and die.