The most variable abundance in the atmosphere is
Water Vapour
and
Ozone
It is the most abundant element!
Water Vapor
Yes, trees do provide most of our oxygen for the atmosphere
Plants gives us most of our oxygen in the atmosphere.
what is most of the air in the atmosphere made up of
The most variable abundance in the atmosphere is Water Vapour and Ozone
Nitrogen
It is the most abundant element!
Water Vapor
Hydrogen and HeliumThe major component of Uranus's atmosphere is Hydrogen.
Most abundant - Water Vapor
0.0005%
On Earth itis found mostly in the atmosphere but only in traces: around 1 part in 20 million. Its abundance is unusually high in the atmosphere of Jupiter.
The water is not so abundant in the atmosphere and is very variable (o-1 %).
Nitrogen, about 3/4 of the atmosphere's volume.
The Earth's atmosphere has 21% oxygen
Around 87 parts per billion in the earth's atmosphere.