1970: First Earth Day is held in the United States on 22 April.
1990: 200 million people in 141 countries take part – environmental issues go global.
1992: Pressure from Earth Day paves the way for the United Nations Earth Summit in Rio de Janeiro, in which environmental concerns take centre stage. Energy Saving Trust was created as part of the UK’s response to this summit.
1994: The United Nations Framework Convention on Climate Change (UNFCCC) ratified following the Rio de Janeiro meeting, introducing (non-binding) limits on greenhouse gas emissions.
2000: 184 countries and hundreds of millions of people demand action on global warming and clean energy.
2010: A Billion Acts of Green and The Canopy Project is launched. More than 75,000 global partners in 192 countries engage.
2015: Earth Day is chosen by the United Nations as the day to sign the Paris Agreement on climate change.
2020: The 2020 event celebrated 50 years of global climate action, aiming for one billion people globally to get involved.
2021: Earth Day 2021 will run alongside the Biden Administration’s global climate summit in the US and will be a live, digital event for the second year.