Air Quality for other locations
Experts say earthquake activity in the state of Oklahoma has risen by 5,000% since fracking, or hydraulic fracturing, began in the area in 2009.
L.A. road mysteriously buckles, forcing closure
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Alberta MLA dies in snowy highway crash
Hubble will see a supernova in 2016. Here's how we know
Brief: Wintry blast wreaks havoc on roads
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