Joyce Huang asked in Science
My answer was 4 but the correct answer turned out to be 3. Please give me a through explanation, it will be appreciated.
Nikhil Kumar answered this
(a) could also have been the correct answer because When you plant trees (reforestation),you are directly cleaning the air. As a tree matures, it can consume carbon dioxide per year as it turns that CO2 into parts of itself. But we can consider here that since reforestation takes many years ie. minimum 65 years this could be the reason of it not included.
So, (3) is the correct answer.