Botswana’s tourism industry, which accounts for a fifth of the economy, is heavily reliant on the world’s biggest elephant population, but the animals have become a political issue as there are too many of them and they destroy crops and occasionally trample villagers. Now, elephants are beginning to migrate into neighboring Angola and the governments of both countries are helping them do so by removing land mines left over from Angola’s civil war and tearing down fences. “Southern Angola has prime elephant habitat, and, if conditions are safe for elephants, they will return to Angola in great numbers,” Bloomberg quotes Mike Chase, the founder and director of research non-profit Elephants Without Borders as saying. “I am confident if afforded the right protection, elephant numbers in Angola’s conservation areas could increase quickly,” he added.