U.S. Stepping Up Earth’s Protection From Asteroids, Comets

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The U.S. government is stepping up efforts to protect the planet from incoming asteroids that could wipe out entire regions or even continents.

The National Science and Technology Council released a report Wednesday calling for improved asteroid detection, tracking and deflection. NASA is participating, along with federal emergency and White House officials.

Th report says that incoming asteroids could have "major environmental, economic, and geopolitical consequences" even if the impact occurs outside of the U.S.

For now, scientists know of no asteroids or comets heading our way. But one could sneak up on us, and that’s why the government says it wants a better plan.

NASA’s planetary defense officer, Lindley Johnson, says scientists have found 95 percent of all near-Earth objects measuring one kilometer (two-thirds of a mile) or bigger. But the hunt is still on for the remaining 5 percent and smaller rocks that could still inflict big damage.

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