State OPR says agencies must quantify and mitigate greenhouse gas emissions from projects. But determining significance and cumulative impact is likely to be tricky.

Redevelopment may have been the biggest winner in Tuesday's primary election. Statewide, voters rejected Proposition 98, an initiative to prohibit the use of eminent domain for economic development purposes. In San Francisco, voters supported a huge redevelopment project at the former Hunter's Point shipyard and Candlestick Point. And in Napa County, voters rejected a slow-growth initiative that was aimed at halting redevelopment of a former industrial site just south of Napa.

Numerous cities and counties in the process of updating their general plans are addressing climate change with policies for mitigating greenhouse gas emissions and, to a lesser extent, adapting to changing conditions. Some localities have adopted climate action plans that affect the general plan and other long-term planning documents, while others have written specific general plan policies and implementation measures.