Earth Day started as a 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...
Has it had an impact?
Indeed it has -
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