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One small device may help save half a billion gallons of water in the American west at buildings operated by The Church of Jesus Christ of Latter-day Saints.

That’s about how much water it would take to fill 750 Olympic-sized swimming pools, according to a news release .

How do you save 500 million gallons of water?

The church is installing more than 3,000 smart controllers at its properties across the Intermountain West.

That’s the how. Here’s the why:

“Water is a sacred and finite resource,” according to a church FAQ sent with the press release on the project.

Presiding Bishop Gérald Caussé has said both the church and its members have a res

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