Que 1. Why is it necessary to conserve our environment?  Ans. It is necessary to conserve ou...

Que 1. Why are crop fields known as artificial ecosystems?  Ans. Crop fields are man-made an...

Que 1. Differentiate between biodegradable and non-biodegradable substances with the help of one exa...

Que 1. Suggest any five activities in daily life which are eco-friendly.  Ans. (i) ...