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Pollution controls help red spruce rebound from acid rain

STOWE, Vt. — The grey trunks of red spruce trees killed by acid rain once heavily scarred the mountain forests of the Northeast. Now those forests are mostly green, with the crowns of red spruce peeking out of the canopy and saplings thriving below.

A main reason, scientists say, is a government-enforced reduction in the kind of air pollution that triggers acid rain.

Spacewalking astronauts set up TV cameras for arriving ships

CAPE CANAVERAL, Fla. — Spacewalking astronauts set up TV cameras Thursday for new crew capsules set to arrive in coming months.

The International Space Station’s commander, Drew Feustel, and Ricky Arnold completed the job after struggling with a balky shield for protection against space debris. They accomplished everything, but a small item managed to slip away.