Explanation

World Environment Day was first 1974 observed in the city of Spokane in the USA.

Since 1974, World Environment Day has been celebrated every year on 5 June.

In 1972, the United Nations General Assembly established World Environment Day

World Environment Day Also called Eco Day

The Official name of World Environment Day is UN World Environment Day

What is the theme of World Environment day 2021?

Ecosystem Restoration  

What is the theme of World Environment Day for the year 2022?

Only One Earth  

How many times did Pakistan host World Environment Day?

one time 

Which of the following country hosted United Nations World Environment Day 2021?

Pakistan  

while