Earth Day started as US 'teach-in' 56 years ago, now it's a global event

Millions of people around the world will pause Wednesday, at least for a moment, to mark Earth Day. It’s an annual event founded by people who hoped to stir activism to clean up and preserve a planet that is now home to some 8 billion humans and assorted trillions of other organisms. Here are answers to some common questions about Earth Day and how it came to be: Why do we celebrate Earth Day? Earth Day has its roots in growing concern over pollution in the 1960s, when author Rachel Carson’s 1962 book “Silent Spring,” about the pesticide DDT and […]... Keep on reading: Earth Day started as US 'teach-in' 56 years ago, now it's a global event

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