He bought a 'ruined' island for £40k—now, a million seabirds call it home.

In 1973, Christopher Cadbury funded the £40,000 purchase of Aride island in the Seychelles to stop the harvesting of seabird eggs. The island was once a coconut plantation, but nature recovered after the sale. Today, over 1 million seabirds breed there each year, showing how conservation efforts saved the ecosystem.