Question

List any three human activities which could lead to an increase in carbon dioxide content of air?

Answer 1

The three important human activities which increase the atmospheric CO₂ are:

Combustion: Combustion of fuels, coal, petroleum products, cowdung, etc. considerably increases CO₂ content of the air.

Respiration: Human beings release CO₂ into the atmosphere as a by-product of oxidative metabolism.

Deforestation: Cutting of trees by human beings, for their material advantage, is responsible for the increase in CO₂ content of the air.