- 02/02/2021 World Wetlands Day
- 12/03/2021 China’s Arbor Day
- 21/03/2021 World Forest Day
- 22/03/2021 World Water Day
- 23/03/2021 World Meteorological Day
- 07/04/2021 World Health Day
- 22/04/2021 Earth Day
- 22/05/2021 International Day for Biological Diversity
- 31/05/2021 World No Tobacco Day
- 05/06/2021 World Environment Day
- 17/06/2021 World Day to Combat Desertification and Drought
- 11/07/2021 World Population Day
- 14/09/2021 Clean Up the World Weekend
- 16/09/2021 International Day for the Preservation of the Ozone Layer
- 16/10/2021 World Food Day