The Science of Sustainability

Tag: John Muir

Century-Old Battle Over Yosemite's 'Second Valley' Heats Up

Century-Old Battle Over Yosemite's 'Second Valley' Heats Up

One of California's oldest environmental battles is on the San Francisco ballot. Hetch Hetchy Valley in Yosemite National Park holds most of San Francisco's water supply. But some environmental groups want to turn back the clock.

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Hetch Hetchy Aqueduct: Big Fixes for Big Quakes

Hetch Hetchy Aqueduct: Big Fixes for Big Quakes

The San Francisco Public Utilities Commission is hard at work on a $4.6 billion, decade-long construction project to overhaul the Hetch Hetchy water system, which delivers water from the Hetch Hetchy reservoir in Yosemite National Park and five local reservoirs to 2.5 million residents in the Bay Area.

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