Climate Change's Biggest Threats Are Those We Aren't Ready For: Report

Climatic changes -- and the results of those changes -- could occur within decades or even sooner, and they are becoming a greater concern for scientists, according to a new paper from the National Academy of Sciences.

"The most challenging changes are the abrupt ones," said James White, a professor of geological sciences at the University of Colorado in Boulder and chair of the report committee. White and several coauthors of the paper spoke at a press conference Tuesday morning.

The paper focuses on those impacts due to climate change that can happen most quickly. Among these are the rapid decline in Arctic sea ice that scientists have seen in the last decade and increased extinction pressure on plants and animals caused by the rapidly warming climate.

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