Question

what is world earth day ? why is it celebrated ?

Answer 1

the earth day is an event observed on 22April to promote understanding of important environmental issues so that more people are aware of the critical actions we need to take to protect our environment.
It is celebrated to commit yourself to service on or around Earth Day — plant some trees, clean up a stream or help your local community garden

Answer 2

Earth Day is an annual event which is celebrated every year on April 22 to bring

awareness for safeguarding the environment from inhumane activities.

The main aim of celebrating this day is to endorse people to do the things

that will benefit the Earth like planting trees , using solar power & recycling.

Hope it helps....