Question

Question 1

Which of the following serve as green lungs?
(a) Green pigment of the plants
(b) Forests
(c) Kitchen gardens
(d) Greenhouse gases

Answer 1

The answer is the option (b).

Forests serve as green lungs as they release oxygen for breathing and respiration and help in maintaining oxygen and carbon dioxide balance in the atmosphere. Animals during breathing take oxygen in and release carbon dioxide. Plants take in carbon dioxide and release oxygen during the process of photosynthesis, which is then used by the animals for respiration. In this way, forest helps in maintaining the balance between oxygen and carbon dioxide in the atmosphere. Hence are called green lungs.