Earth First! Earth First! is a radical environmental advocacy group that emerged in the Southwestern United States in 1979. It was co-founded on April 4, 1980 by Dave Foreman, Mike Roselle, Howie Wolke, Bart Koehler, and Ron Kezar.
A eutrophic body of water, commonly a lake or pond, has high biological productivity. Due to excessive nutrients, especially nitrogen and phosphorus, these water bodies are able to support an abundance of aquatic plants. Usually, the water body will be dominated either by aquatic plants or algae.
Major sources of excess nutrients which are responsible for eutrophication are agricultural fertilizers, livestock wastes and domestic sewage. Agricultural fertilizers provide inorganic nutrients like nitrates and phosphates which play an important role in this process.utrophication can be of two types.Man madeWhen the waste materials like sewage effluents are thrown in the water than it contains some nutrients which causes this problem.