While people everywhere are trying to figure out how to slow down global warming, scientists continue to look at the effects it's having on different species. For example, researchers at North Carolina State University, Case Western Reserve University, the Instituto de Pesquisas Ecológicas in Brazil, and the University of Maryland study butterflies. It's known that butterflies naturally "emerge earlier in North Carolina than they do in New England, because it's warmer", so these scientists were wondering what would happen if everywhere is getting warmer, specifically urban cities. The results of the study showed that "the combined effect of an urban area and a warmer part of the state appeared to delay emergence in seven of the 20 species" studied. The scientists don't know what the tipping point is, and may never find out. This research is difficult and the species aren't always able to adapt.
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