Retrieved 2019-05-01. "Natural gas and the environment". U.S. Energy Information Administration. Retrieved 2020-09-30. "Natural gas is a much 'dirtier'
2001). "An ecosystem approach to natural resource conservation in California". CIPA Publication No. 106. InterEnvironment Institute. Archived from the original
1800–1995. Alexandria, VA: U.S. Army Corps of Engineers Office of History. Natural Communities of Louisiana: Bayhead Swamp/Forested Seep. Louisiana Department