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Every 22 April Earth Day is celebrated by over a billion people. Earth Day was first observed in 1970 in Wisconsin, USA and that year over 20 million people demonstrated for a healthy and sustainable environment.
On the 20th anniversary of Earth Day the event went global with 200 million people taking part in 141 countries. The event has been growing ever since and in 2016 the day celebrates it's 46th year!
So, this is your chance to get involved and take part in activities to raise awareness of the key issues affecting global climate change.
And it's no coincidence they chose the 22nd of April to recognise this special day - it is the date which marks the start of spring in the northern hemisphere and autumn in the southern hemisphere!
This year the theme of the day is 'Trees for the Earth!'. At the Earth Day website there is loads of information about issues like climate change, food and recycling and waste reduction, and there are also lots of ways to get involved.
You can see a full list of events on the site, and for all you teachers out there, there's lots of ideas to get you talking about the earth in the classroom!
So why not get involved today? Go green and think about all the positive ways we can affect our environment.