As researchers learn more about the greenhouse gases from
livestock/poultry farms recommended practices to reduce these
emissions may include improved diets, increased feed efficiency,
improved energy efficiency, manure storage covers and unique
manure handling and storage technologies. To learn more about
the greenhouse gasses associated with livestock production see: 
http://www.news.msue.msu.edu/news/article/determining_livestock_
productions_contribution_to_atmospheric_greenhouse_ga To learn
more about these topics visit Air Emissions and Animal
Agriculture, a new online resource developed by Michigan State
University Extension and Purdue Extension, that pulls together
information on the odors, greenhouse gases and other air
emissions associated with livestock and poultry production, and
information such as what is a CAFO. The development of Air
Emissions and Animal Agriculture was funded by the MSU Animal
Agriculture Initiative. This informative internet resource can
be found at: http://air101.msue.msu.edu