Question

what is usefull and harmfull change

Answer 1

What is an useful change ?

A change that is useful for a human being or the Environment is an useful change . They are also called desirable changes.These changes are beneficial for us in our day - to - day lives .

Examples :

(i) Recycling of plastic

(ii) Waste management .

(iii) Cleaning toilets .

(iv) Recycling paper

(v) Reducing wastage

What is a harmful energy ?

A change that is harmful for us or the Environment are called the harmful changes. These are also called undesirable changes . They are harmful in our daily lives .

Examples :

(i) Burning of coal .

(ii) Vehicular fumes .

(iii) Burning of sulphur.

(iv) Loud noise .

(v) Pollution of land , water , etc.

Hope it helps

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