The Science of Sustainability

Tag: sfpuc

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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