GENERAL KNOWLEDGE

Detailed explanation-1: -Although hydrogen is the most abundant element in the universe (three times as abundant as helium, the next most widely occurring element), it makes up only about 0.14 percent of Earth’s crust by weight. It occurs, however, in vast quantities as part of the water in oceans, ice packs, rivers, lakes, and the atmosphere.

Detailed explanation-2: -The Earth’s atmosphere contains very little hydrogen gas – its very low density enables it to escape the Earth’s gravity more easily than denser gases like oxygen.