Matt Gonzalez

Already renewable energy advocates are noting that the 42 miles of above-ground right-of-way between Yosemite and the city could be fitted with enough solar panels to generate at least 40 megawatts per year - a proposal the San Francisco Public Utilities Commission has never seriously considered because they currently aren't required to do so.

Some types of environmental restoration projects are well-known; restored wetlands, for instance, or coal mine reclamation projects. Recently though, larger dam removal projects have started, a number of them in Washington state.