Prince Charles, heir to the British throne, has long fancied himself an environmentalist.

In 1970, he gave his first speech on the “climate emergency.” Charles outlined his desire to tackle the pollution destroying beaches and seabirds and that belched out by factories and automobiles. In the half-century since, he has frequently returned to the subject. While he has not forfeited his private jets or stately mansions, he does recycle and encourage organic farming. The charities he heads often encourage environmental awareness. He also uses his bully pulpit to encourage greater environmental consciousness.