Sacramento Bee: Rep. Henry Waxman, D-Los Angeles, the ranking member of the House Committee on Energy and Commerce, asked the Sierra Nevada Research Institute at UC Merced a series of questions about the effects of climate change on California as background for policy development. The following are some of the responses from Sierra Nevada Research Institute director Roger Bales and senior researcher Norm Miller. What are the most serious threats facing Northern California because of climate change? Northern California,...