Earth Day started in 1970, driven initially by politicians and environmentalists in the US and in reaction to environmental problems being seen in the US. In 1990, the observance went fully international and now sees tens of millions of people in dozens of countries engaging in events and actions. Many places have instigated earth weeks and earth month to expand the impacts they can have. For 2022, the theme is Invest in Our Planet.
International Mother Earth Day is a UN observance started in 2009 as an addition to World Environment Day in June. It takes the specific theme of working towards living in harmony with the earth as an eco-system.
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