Press-Enterprise: The effects of climate change on public lands, from the decline of Joshua Tree National Park’s signature trees to melting ice in Glacier National Park, are drawing congressional representatives to the desert this week. The House subcommittee will gather recommendations on how to combat the influence of global warming in national parks during a public hearing Tuesday in Twentynine Palms. “Climate change doesn’t exist in a vacuum. It combines with other stressors and impacts the …