Question

describe
two

Change is harmful​

Answer 1

Some changes have bad effect like pollution and destruction of habitat and lose of lives. Improper disposal of garbage, harmful chemicals and human waste can cause changes. It can pollute air, land and water. Smoke from the burning of oil and coal and wood can also cause air pollution.

Answer 2

Answer:

The two chemical changes which are harmful to us are given below: Rusting on metal objects as it deteriorates the metal surface and decreases the efficiency of it. Rancidity of food items which spoil the foodstuff as it is an oxidation process of food items that spoil the food permanently.

hope its help u