- There is no air in space – Fortunately the occupants of the planet Earth. are provided air, which consist of about 78% nitrogen, 21%...

It is a type of exercise that overloads the heart and lungs and causes them to work harder than at rest. The important idea behind...

At present the composition of our atmosphere is 79% nitrogen, 20% oxygen, and 1% other gases. Earth's atmosphere is a layer of gases...