Numerous states, including Colorado, are involved in "fracking," which is a procedure for harvesting oil and gas that is considered highly controversial. A recent accident at one such site approximately 30 miles north of Denver resulted in three injured workers. Two of them survived, but one worker's injuries were fatal, and he or she died at the scene. One of the surviving individuals required surgery for the injuries he or she suffered.
Fracking involves water and chemicals that are mixed with sand and gravel. The resulting mixture is injected into a well with high amounts of pressure. The process is designed to break open rock formations beneath the surface. It is controversial because it may cause earthquakes and the leaching of chemicals into the water supply.