As well as starring in several high-profile films and TV shows, in particular as Vincent Chase in the long-running show Entourage, Adrian Grenier has spent many years advocating for environmental and social causes.

In recognition of his work, which includes founding the Lonely Whale foundation to protect the ocean environment, Mr. Grenier was named a UN Environment Goodwill Ambassador in 2018.

Ahead of Sunday’s World Wildlife Day, Mr. Grenier spoke to Laura Quinones at UN headquarters in New York, and explained what we can all do to make a difference.