Question

what is the reason of increasing the temperature on the earth ​

Answer 1

Continuous deforestation

Irrational use of exhaustive resources

Over accumulation and additional using of material not good for nature

Industrialisation

Etc

Answer 2

The hole in the ozone later which is made or composed of Ozone (O^3) is becoming bigger and bigger day by day.

This ozone layer protects us from the harmful UV radiations.

Now there's a hole in it .

So , the UV radiations may reach the earth .

The hole in the ozone layer is due to the CFCs (Chlorofluorocarbons) released from ACs and refrigerators.

Hope it helps you.