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.
via Tech News Headlines - Yahoo! News http://news.yahoo.com/project-aims-track-big-city-carbon-footprints-135809903.html
via Tech News Headlines - Yahoo! News http://news.yahoo.com/project-aims-track-big-city-carbon-footprints-135809903.html
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