Colo. Rev. Stat. § 31-15-715
The general assembly hereby declares that landfill gas constitutes a hazard to the health, welfare, and safety of the people of this state, whether such gas has accumulated as a result of a public or private landfill operation, and that the extraction of landfill gas will ameliorate this dangerous condition, and further declares that the development of landfill gas will provide a valuable, alternate energy resource to the citizens of this state. In order to diminish this hazard and utilize this energy resource, the powers of municipalities are hereby expanded to authorize landfill gas exploration, development, and production; the financing thereof; the marketing and sale of landfill gas to any public or private person or entity; and the municipal use thereof for any purpose.
C.R.S. § 31-15-715