India, May 1 -- Earth Day is celebrated on April 22 each year. But few people understand the conditions under which this major initiative was introduced in 1970 by a visionary leader, US Senator Gaylord Nelson. The Earth Day Network's (EDN) website explains the conditions under which the first Earth Day was organised in 1970. It mentions the height of counter-culture in the United States (US), the resistance to the war in Vietnam, the very basic morality of that war and the role of the US in waging violent aggression on one of the poorest countries in the world, so remote from the aggressor nation. Concurrently, the state of the environment in the US was badly degraded with powerful automobiles using large quantities of leaded gas, severa...