Earth is truly a marvelous third planet and 93,000,000 miles (150,000,000 km.) from the sun. Earth’s atmosphere is a gaseous envelope that surrounds the earth planet. It consists of a mixture of gases such as nitrogen, oxygen, carbon dioxide, traces of noble gases (argon, krypton, xenon neon and helium), water vapour and small amount of ammonia, ozone, organic matter, various salts and suspended solid particles. Air is one of the most important ...
