China’s massive Water Diversion Project is designed to bring water from China’s southern regions to drought-prone areas in the north.

Ensuring the quality of that water is a monumental task, and is increasingly crucial as the operation is set to begin in about a month.

CCTV’s Han Bin reports on the efforts made by the government and the cost of keeping the water clean.

Water shortages now impact every continent on the planet. However, there is actually enough water to satisfy global needs.

Upmanu Lall is the director of Columbia University’s Water Center.