Action in the Colorado oil shale fields, meanwhile, is heating up. With today's high prices for petroleum, oil shale finally looks unquestionably economic. The companies involved got another green light this week. An 18-month study on air pollution conducted by the National Commission on Air Quality concluded that a shale industry of about 690,000 barrels per day would not violate air-quality standards.
Other studies conclude there is enough water to support about t he same amount of oil shale production.m