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Nation/World

January 12, 2013

Report: Climate change affecting US economy, people

WASHINGTON — A new report warns that climate change driven by human activity already is affecting the American people and economy, with more frequent and intense heat waves, heavy downpours and, in some places, floods and droughts.

A draft version of the National Climate Assessment that was released yesterday warns that as the Earth continues to warm because of increasing levels of greenhouse gases in the atmosphere, the health and livelihoods of many Americans and the ecosystems that sustain the country face some frightening impacts. Sea levels are rising, scientists warn, oceans are becoming more acidic, and glaciers and Arctic sea ice are melting.

The National Climate Assessment, which is required under the Global Change Research Act of 1990, is presented to the president and Congress every four years. It’s designed to provide a thorough overview of the status of climate science and climate change impacts.

It came the same week that the National Oceanic and Atmospheric Administration said U.S. temperatures in 2012 were the highest since record-keeping began in 1895. But the draft assessment warns that human-induced climate change “means much more than just hotter weather.”

The report references increases in ocean and freshwater temperatures, frost-free days and heavy downpours. There’s also more extreme weather, including more frequent and intense winter storms along the West Coast and the coast of New England. Such storms include Sandy in late October, which while not a particularly intense hurricane, exposed the sorts of problems that communities may face as sea levels rise.

“This draft report sends a warning to all of us: We must act in a comprehensive fashion to reduce carbon pollution or expose our people and communities to continuing devastation from extreme weather events and their aftermath,” Sen. Barbara Boxer, D-Calif., who heads the Senate Environment and Public Works Committee, said in a statement.

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