Huffington Post: America's national parks are being adversely affected by climate change, with temperatures becoming more extreme in recent years compared to the historical norms of the last century, a new study by the National Park Service (NPS) finds.
"These changes will have implications for what visitors see and experience in national parks and will require new approaches to the protection of natural and historic resources within parks," the NPS says. America's national parks attract 275 million visitors a...