Question

List any two human activities that lead to an increase in the carbon dioxide content of air.

Answer 1

following human activities lead to increase in carbon dioxide level in air:

human beings burn fuels such as petroleum and coal which leads to increase of carbon dioxide level in atmosphere.

also human beings cut trees which lead to deforestation. lesser trees means higher amount of carbon dioxide in atmosphere as trees take in carbon dioxide and convert it into oxygen.

Answer 2

1. The increase in population leads to the increase of vehicles used for transportation and other purposes. These vehicles emit co2 which increases its volume in the air.
2. Deforestation also lead to an increase in co2 as trees absorb co2 in the process of photosynthesis which maintains the balance of gases in the air.