Climate change is affecting life in California's deserts. Scientists have found more dead desert tortoises than alive, and some lizard and insect populations have disappeared from areas they once thrived in. Birds are shifting to higher elevations as mountainsides grow hotter and drier. The Joshua tree is now threatened under the Endangered Species Act. National Geographic reports that the desert Southwest and Arctic are being impacted faster by climate change than anywhere else because they are extreme ecosystems. The document expresses concern about impacts to the desert being overlooked compared to polar regions, and gives examples of black-throated sparrows that failed to reproduce during extremely hot and dry years, potentially disrupting food chains. Solutions proposed include reducing fossil fuel