Question

reasons.
(a) We must use cotton clothes in
summer.
(b) We must observe economy in the
use of materials.
(c) Saving paper is the need of the
hour.
(d) Man-made materials have more
demand.
(e) Humus is a natural material.

​

Answer 1

Answer:

1.Cotton is a strong water absorber helps to absorb the sweat and introduce to the environment of evaporation. ... Our body takes out heat as the sweat evaporates from our body.

2.We must observe economy in the use of materials because they directly or indirectly affect our environment. ... Increased use of man made materials pose a threat to the environment because their disposal is not easy and leads to environmental pollution.

3.Every sector and company has begun contributing its bit towards the cause. Retailers must begin the 'turning the retail eco-friendly' exercise by recycling paper. 

4.Man made material have more demand because nowadays they are used more and they are also made by natural substance.

5.Humus is dark, organic material that forms in soil when plant and animal matter decays. When plants drop leaves, twigs, and other material to the ground, it piles up. ... Earthworms often help mix humus with minerals in the soil. Humus contains many useful nutrients for healthy soil.

Explanation:

I hope my answer helps you.

Answer 2

Explanation:

I know the reason for the first and the last only.

(a)We must use cotton clothes in summer because in summer we sweat more and cotton being a good absorber absorbs the sweat making us feel comfortable.

(e) Humus is a natural material as it is made from dead & decaying matter. Small insects,worms,etc. after death decomposes and make humus.

Humus also make soil fertile.