WDAY: The News Leader

Published May 12, 2013, 01:22 PM

Project aims to track big city carbon footprints

LOS ANGELES (AP) — Every time Los Angeles exhales, odd-looking gadgets anchored in the mountains above the city trace the invisible puffs of carbon dioxide, methane and other greenhouse gases that waft skyward.

By: ALICIA CHANG,AP Science Writer , Associated Press

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