Seems that the EPA has their fingers in this pie as well:

http://www.epa.gov/lmop/index.htm

The U.S. EPA's Landfill Methane Outreach Program (LMOP) is a voluntary
assistance and partnership program that promotes the use of landfill gas as
a renewable, green energy source. Landfill gas is the natural by-product of
the decomposition of solid waste in landfills and is comprised primarily of
carbon dioxide and methane. By preventing emissions of methane (a powerful
greenhouse gas) through the development of landfill gas energy projects,
LMOP helps businesses, states, energy providers, and communities protect the
environment and build a sustainable future.