What gas makes up the largest percentage of the earth’s atmosphere?

Take a guess im getting rid of my account might as well do it in style a fishing boat, with a ladder in it, is leaning against a wall at the harbor. there are 5 oars and 2 fishing nets in the trawler. the distance between two consecutive steps on the ladder is 1 meter. if waves lashing against the wall rise a half meter in every half hour, how long will it take before 6 steps of the ladder are under the waves?

India's population is made up of percent hindus.

During which era in earth's history were the first insects? mesozoic precambrian cenozoic paleozoic