Two of California’s most treasured natural settings are also among the most imperiled landscapes on Earth, as disruptive changes in climate patterns promise to melt glaciers, dry out rivers and set forests ablaze in coming generations, says a coalition of conservation, sporting and community groups.

Unless people significantly alter the way they manage water supplies and fuel their cars and homes, the Sierra Nevada and Sacramento-San Joaquin River Delta will become increasingly hostile to already-dwindling wildlife and fish species, the Endangered Species Coalition said in a report .

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