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Human activities affect marine life and marine habitats through overfishing, habitat loss, the introduction of invasive species, ocean pollution, ocean acidification and ocean warming. These impact marine ecosystems and food webs and may result in consequences as yet unrecognised for the biodiversity and continuation of marine life forms. [3]
However, in developed countries, as can be expected, the death toll is significantly lower but the economic losses due to coastal hazards are increasing. The US for example had major losses through Hurricane Andrew, which hit Florida and Louisiana in 1992. [10] This rushing to the coast is exhibited in property value.
The input of pollutants into a water body may impact the water's ability to deliver ecological, recreational, educational, and economic services. While the impacts of water pollution vary considerably based on a variety of site-specific factors, they may be either direct or indirect. [ 4 ]
Marine debris is mainly discarded human rubbish which floats on, or is suspended in the ocean. Plastic pollution is harmful to marine life . Another concern is the runoff of nutrients (nitrogen and phosphorus) from intensive agriculture , and the disposal of untreated or partially treated sewage to rivers and subsequently oceans.
Topsoil runoff from farm, central Iowa (2011). Water pollution in the United States is a growing problem that became critical in the 19th century with the development of mechanized agriculture, mining, and manufacturing industries—although laws and regulations introduced in the late 20th century have improved water quality in many water bodies. [1]
The act regulates the ocean dumping of all material beyond the territorial limit (3 miles (4.8 km) from shore) and prevents or strictly limits dumping material that "would adversely affect human health, welfare, or amenities, or the marine environment, ecological systems, or economic potentialities". [4]
Hints and the solution for today's Wordle on Wednesday, December 4.
The definition of a nonpoint source is addressed under the U.S. Clean Water Act as interpreted by the U.S. Environmental Protection Agency (EPA). The law does not provide for direct federal regulation of nonpoint sources, but state and local governments may do so pursuant to state laws.