By Jim Tankersley
WASHINGTON -- If global warming continues unchecked, Chicago would see a repeat of the killer 1995 heat wave every summer by the middle of the century, an environmental group says in a study released Wednesday. The report from the Union of Concerned Scientists also predicts that the city's air quality would deteriorate if humans do not scale back greenhouse gas emissions dramatically.Illinois farmers would suffer from droughts, pests and flooding that would more than outweigh any potential benefits from a longer growing season caused by warmer temperatures. Heat stress in cattle could force the state's dairy industry to migrate north.
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