Earth Day 2017 is tomorrow (22 April), bringing together more than 50,000 organisations in nearly 195 countries in order to “educate and activate the environmental movement worldwide”.
The first Earth Day was held back in 1970 and brought together 20 million people in the USA. It helped to create public support for the creation of the Environmental Protection Agency (EPA) and contributed to the passage of the Clean Air Act, the Water Quality Improvement Act, the Endangered Species Act and several other environmental laws.
The theme for 2017 is “Environmental & Climate Literacy”, and you can read more about it here.