As California's population grows from 35 million to 55 million in 2050, temperatures will rise between 1 and 2.3 degrees F, according to a report released by the California Energy Commission and the California Environmental Protection Agency July 31. Mincing no words, the state agencies call global warming effects "unavoidable." Our Changing Climate predicts up to 100 more days per year with temperatures above 90 degrees in Los Angeles and above 95 degrees in Sacramento. Among the other conclusions: - There will be 75-85 percent more days with weather conducive to smog in Southern California. - Decreasing Sierra snowpack will hamper hydropower operations. Hydro may be reduced by up to 30 percent. Skiing for sport will be nearly eliminated. - Orchards will decline as the cool weather needed to set fruit disappears. - Dairy production is expected to decrease by up to 20 percent. - Sea levels where many intakes for cooling power plants reside will rise by up to 35 inches by the end of the century. - Infectious diseases will expand. What the report notes as "unknown" is how the climate will respond to these changes. It could loop back on itself, making things worse. For instance, clouds could trap heat, or they could radiate heat back into the atmosphere.