Associated Press: California has always been a place defined by its landscape, from the mountains that enchanted John Muir to the wine country and beaches that shape its culture around the world. Yet as the state begins to grapple with the effects of a warming climate, scientists are trying to forecast how the nation’s most geographically diverse state might change in the decades to come. What they envision is a landscape that could look quite different by the end of the century, if not sooner. …