Ilha Armona in Portugal's Algarve is a beautiful island with white beaches and blue seas that tourists hardly visit.

Small islands face some of the biggest threats from climate change, including stronger storms and sea level rise that are making it harder for people to remain in their homes and earn a living.

There are currently 39 small island developing States in three geographic regions: the Caribbean; the Pacific; and Africa, Indian Ocean and South China Sea. These small islands have a combined ...