DSTE, Department of Science,Technology & Environment, Government of Tripura"

• The World Day to Combat Desertification and Drought is a United Nations observance each June 17. Its purpose is to highlight ways to prevent desertification and recover from drought. Each annual celebration has a different theme.

• World Environment Day ('WED') is celebrated every year on June 5 to raise global awareness to take positive environmental action to protect nature and the planet Earth.

• September 16 was designated by the United Nations General Assembly as the International Day for the Preservation of the Ozone Layer.This designation was made on December 19, 1994, in commemoration of the date, in 1987, on which nations signed the Montreal Protocol on Substances that Deplete the Ozone Layer.

• National Green Corps is a programme of the Ministry of Environment and Forests of Government of India covering around 1,20,000 schools in India with NGC School Eco Clubs. Environmental activity in schools in India is promoted through the National Green Corps. Each NGC School Eco Club has 30 to 50 NGC Students or NGC Cadets who form the National Green Corps

• Earth Day is an annual event, celebrated on April 22, on which day events worldwide are held to demonstrate support for environmental protection. It was first celebrated in 1970, and is now coordinated globally by the Earth Day Network, and celebrated in more than 192 countries each year

• National Science Day is celebrated in India on 28 February each year to mark the discovery of the Raman effect by Indian physicist Sir Chandrasekhara Venkata Raman on 28 February 1928.For his discovery, Raman was awarded the Nobel Prize in Physics in 1930

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