World Environment Day is the most renowned day for environmental action. Since 1974, it has been celebrated every year on 5 June; engaging governments, businesses, celebrities and citizens to focus their efforts on a pressing environmental issue.

In 2020, the theme is biodiversity–a concern that is both urgent and existential. Recent events, from bushfires in Brazil, the United States and Australia to locust infestations across East Africa–and now, a global disease pandemic–demonstrate the interdependence of humans and the webs of life in which they exist. Nature is sending us a message.