Lake Baikal, the world’s deepest lake, is vast and magnificent. Measuring one mile deep and nearly 400 miles (636 km) by 49 miles (79 km) across, it contains one-fifth of all the surface fresh water in the world. But this water is largely inaccessible. Lake Baikal is located in Siberia—one of the most remote areas of Russia. With water so desperately needed in much of our planet, it’s ironic that such a vast supply of water is tucked away in a place where not many people can access it.

Although Lake Baikal may be remote, there is an endless source…