Question

Que. Why forests are called green lengs?​

Answer 1

Answer:

Because forests provide us oxygen. That is why they are called as green lungs.

Answer 2

Answer:

Forests are called Green Lungs of the world. This is because Forests act as lungs. They give Oxygen (O2) that is very necessary for human survival. It is the same as we Cannot Live without lungs; The world cannot live without Forests. The word "Green" indicates the colour of the Forests.