Реферат: Pollution In Ocean Environmets Essay Research Paper
Herbicides Insecticides Fungicides Other Total
Agriculture 525 225 51 60 861
Industrial 115 40 21 0.1 176.1
Home/Garden 30 35 12 0.1 75.1
Total 670 300 84 60.2 1112.2
That is in millions of pounds of the active ingredients only. That is a lot of
toxins being used in the United States and how much was properly stored,
applied and disposed of. Improper use occurs a lot, whether it is a spill or
aplying too much people do not properly use the chemicals and it ends up
hurting the environment. The pesticides that are used are made to be as
dilute as possible to prevent toxins escaping. The pesticides might need to
become stronger now because the pest have become resistant to the pesticide.
There are 428 arthropods, 36 weeds and at least 90 plant pathogens that are
resistant to pesticides (Mellanby, 125). If the pesticides do not effect the
pests then they are going to have to make new pesticides that will be stronger.
Sewage flows into coastal waters all over the world and in many places
it is left untreated. In Hartlepool, England 300 million gallons of untreated
sewage enters the sea every day (Raw Sewage, On-line). This causes a
problem because the sewage that is released untreated carries organic waste
and nutrients, and disease causing bacteria. Organic waste and nutrients
cause oxygen depletion in the water, this is called eutrophication. Nutrients
such as nitrogen and phosphorus provide algae and other aquatic plants with
perfect environment for growth. The plants then overpopulate the area and
when they die the decomposers take oxygen from the water causing fish to
die in excessive amounts because the environment is not suitable for life.
Also eutrophication cause the water have algae slime and other aquatic plant
to wash up on shore or float on top of the water and there by making bad
aesthetics. This causes many places that have relied on the water for tourism
and a source on income to go out of business. Disease causing bacteria