Article posted: 12/10/2012 1:56 PM

Energy experts say drilling can be made cleaner

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On the plains of north Texas, there's a drilling boom, but some air pollution levels have declined — as far away as Colorado. Opponents point to drilling. Companies say drilling is safe.

ASSOCIATED PRESS

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In the Colorado mountains, a spike in air pollution has been linked to a boom in oil and gas drilling. A thousand miles away on the plains of north Texas, there's a drilling boom, too, but some air pollution levels have declined. Opponents of drilling point to Colorado and say it's dangerous. Companies point to Texas and say drilling is safe.