Question

Large-scale deforestation leads to a decrease in the amount of gas A in the atmosphere whereas the amount of gas B increases. The increased amount of gas B in the atmosphere causes an effect C which leads to excessive heating of the earth and its atmosphere producing an undesirable phenomenon D. What are A, B, C and D?

Answer 1

Here A, B and C are the following:

A => Oxygen gas [defforestation leads to the decrease of oxygen gas which can be harmful to us]

B => Carbon dioxide [Trees take in carbon dioxide from the air but their absence can make a vast difference]

C => Greenhouse effect [Excessive amount of carbon dioxide leads to global warming ie the temperature of the earth increases]

D => Global warming