When The Nature Conservancy of California asked Silicon Valley venture capitalist Seth Neiman for a multimillion-dollar contribution to help protect local open space, no one involved had the slightest notion that they were about to step into one of the deepest and most difficult questions in conservation worldwide. The Conservancy's fundraising team was just trying to raise enough money to buy conservation easements on Mount Hamilton, an island of natural habitat in an encroaching sea of suburbs south of San Jose.
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