Poor Sanitation

UNITED NATIONS - A three-day summit to push global leaders to meet U.N.

MUMBAI, India - At about two feet tall, it may turn out to be the world's most compact revolution: The Tata Swach, launched Monday, is a water purifier priced for the masses, which India's Tata Group hopes will help save the lives of millions of people who die each year of waterborne diseases.