Question

Give reasons for the following-
1) deforestation is harmful for the environment
2) goldsmith glows the outermost layer of a flame to melt gold and silver metals
3) CNG is a cleaner and eco friendly fuel
4) never sleep in a closed room with burning coal
5) we should completely put off fire after camping in a forest

Answer 1

1. Deforestation is harmful for environment because
a) It causes less rainfall.
b) It lowers groundwater table.

2.
He does so because the outermost layer of flame is the hottest so gold melts easily when it is put on non luminous outermost layer

4.
Coal release carbon monoxide gas when burnt. carbonmonoxide is very harmful gas which can cause death due to choking.

5.
It should be done because campaign fire can increase and can become dangerous.