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Global warming -  increase of temperatures all over the country (geographical region) over a long duration (like decades).

Shortage of rains and untimely rains and so agriculture is suffering. Due to that there will be shortage of food and change in the lives of farmers.

The winters become hotter. People will not like hotter temperatures in summer.
Ice over the Himalayas is probably melting faster than before.

They cause reduction of water levels underground. This will result in shortage of water supply to people.   Climate changes will cause natural calamities like floods and famines. They cause damage to our ecosystem.

The wild life will be affected. The climate changes over some centuries can lead to side effects on the entire human life and wild life. Food chain and food web will be affected resulting in damage to human beings.