Attempts to clean up water supplies in Mexico

The sewage of some 300,000 people is being sent directly into Mexico's Lake Chapala. It's the source of water for 60% of residents of Guadalajara. Further downstream, international companies send industrial waste into the Santiago River. Studies have found that people in the area suffer kidney disease at higher-than-normal rates. What used to be known as a vacation destination has recently been dubbed a "slow moving Chernobyl." Glynis Board reports from Jalisco, Mexico.