WASHINGTON (AP) — The nation needs to ramp up efforts to suck heat-trapping gases out of the air to fight climate change, a new U.S. report said.

The report Wednesday from the National Academy of Sciences says technology to do so has gotten better, and climate change is worsening. By mid-century, the world needs to be removing about 10 billion metric tons of carbon dioxide out of the air each year. That's the equivalent of about twice the yearly emissions of the U.S.

Last year the world put nearly 37 billion metric tons of carbon dioxide into the air, and emissions have been rising.

Steve Paca...