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

AcademicChemistryNCERTClass 7

Correct Answer: (b) Forests

Explanation: Plants in the forest release oxygen during photosynthesis which provides oxygen to all living beings. It also helps to maintain the ratio of oxygen to carbon dioxide in the atmosphere. 

Updated on 10-Oct-2022 13:22:07