CNN: If you can’t stand global warming, get out of the tropics. “Many lowland tropical species could be in trouble,” a team of researchers said. While the most significant harm from climate change so far has been in the polar regions, tropical plants and animals may face an even greater threat, say scientists who studied conditions in Costa Rica. “Many lowland tropical species could be in trouble,” the team of researchers, led by Robert K. Colwell of the University of …