The history of water pollution environmental sciences essay
Air Pollution and Health. When you flush the toilet, the waste has to go somewhere and, even after it leaves the sewage treatment works, there is still waste to dispose of.
Analysis of groundwater contamination may focus on soil characteristics and site geology, hydrogeologyhydrologyand the nature of the contaminants.
Water pollution essay 1000 words
Misra examined the costs and benefits of water pollution abatement for a cluster of small-scale industries in Gujarat, India. The calculations take into account the 20 or 30 years that have elapsed since the disease outbreaks occurred and annualize the costs and benefits over a year period. Human's dependency on water will never go away, making it a key part to any civilizations future. During the s and early s, when the government made many of the major decisions about intensified pollution control interventions, Japan's gross domestic product GDP per capita was growing at an annual rate of about 10 percent, similar to that of the rapidly industrializing countries in the early 21st century. The variety of health effects of urban air pollution and the variety of sources create opportunities for ancillary effects that need to be taken into account in economic cost-effectiveness and cost-benefit analysis. In one study of shearwaters in the North Pacific, over 80 percent of the birds were found to contain plastic residues in their stomachs. But, with the rapid spread of industrialization and the growth of the human population to unprecedented levels, pollution became a universal problem. Due to these contaminants it either does not support a human use, such as drinking water , or undergoes a marked shift in its ability to support its biotic communities, such as fish. Hence, health risks from pesticide water pollution are higher in such countries WHO Thus, a chapter on air and water pollution control links with chapters on, for instance, diarrheal diseases chapter 19 , respiratory diseases in children and adults chapters 25 and 35 , cancers chapter 29 , neurological disorders chapter 32 , and cardiovascular disease chapter 33 , as well as with a number of chapters dealing with health care issues. For instance, Romieu and others report an exacerbation of asthma among children in Mexico City, and Xu and Wang note an increased risk of respiratory symptoms in middle-aged non-smokers in Beijing. Resource extraction and processing industries, which are common in developing countries, emit dust or hazardous fumes at the worksite table Waste from petrochemical manufacturing plants contains suspended solids, oils and grease, phenols, and benzene.
Another country with major concerns about chemicals arsenic in water is Bangladesh. Mercury and cadmium are still used in batteries though some brands now use other metals instead. Today, chemicals from various places and trash of sorts are getting into the water that are commonly used for drinking and other uses such as fishing, swimming, etc.
The health effects included respiratory morbidity as determined by hospital admissions and medical expensesand working days lost for sick adults, and maternal working days lost in the case of a child's illness. This success in disinfecting water supplies has contributed significantly to public health by reducing the transmission of waterborne disease.
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