Super-acidic ocean water found near coasts.

Sunscreen threatens coral.

• U.S. and Canada make deal on salmon.

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• Germany bans pesticides after honeybee deaths.

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• Disney recalls sleeping bags, magic wands over lead paint.

• America’s ten most imperiled wildlife refuges.

• San Francisco green-building plan said to be costly.

• E.U. to award prizes to eco-friendly cities.

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• Humpback whales making a comeback.