They can't be seen, but water footprints are everywhere. That's the message conservationists are conveying to individual homeowners and the largest global companies alike, as water use joins other environmental protection efforts. “People are beginning to realize it's all related,” said Kai Olson-Sawyer, program manager of H2O Conserve, one of several organizations working to get more people thinking about this liquid natural resource. “Water, food and energy are all inextricably linked. ...

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