April 22nd is Earth Day and each year it is marked by more than 1 billion people worldwide taking action to tackle environmental problems, raising awareness of the need for climate action and changing human behaviour to advance sustainability.

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The first Earth Day took place in the USA in 1970 when 20 million Americans came together to demonstrate against big environmental issues that were being ignored at that time including oil spills, river and air pollution. In 1990, Earth Day we