Control of environment : water, Science

Water:

We all know  that safe drinking water is essential for good health. Many of  the diseases in our country are  due to lack of supply of safe drinking water. ~nfortunatel~~  only  18% of  the population  in rural area gets reasonably safe drinking water. The vast majority of our rural and urban population depends upon  surface water, i.e. water from rivers, streams, reservoirs, lakes, tanks and ponds, which generally get their water from rain. Although rain water is the purest water in nature, it becomes impure as it passes through the atmosphere or fl,ows on the ground. It gets contaminated with dust, soot, gases and micro-organisms.  Therefore, surface water possesses all this contamination plus additional contamination  due to human activity, such as bathing, washing clothes and utensils, or washing after passing stools. The 'water obtained from wells or tube wells, springs or handpumps is generally superior  to surface water, because this water is filtered through the ground itself and is free of contamination, unless of course the handpump is not deep enough or is too close to e source of  infection. 

Earlier, you have learnt the names of the diseases which are spread through contaminated water. Disease rates are  directly related to the quality of water supply. It has been shown that with the improvement of water supply in  some of  the States  in India, disease rates have bee" drastically lowered. Drinking water must be free of disease-causing agents or harmful chemicals. Human activity pollutes water supply through negligence in disposing faecal matter, sewage, industrial waste, fertilisers, pesticides and radio-active wastes. In  urban areas only a small proportion of our population enjoys the fac 3ty of sewerage system. Over 70%  of the people living in, rural areas defecate in the open  fie%  leading to great hazards in  spreading various bacterial diseases. Proper disposal of huma;.  excreta is an essential quirement of community health. At home, drinking water can be made safe by  filtration and boiling. Filtration removes most of the suspended impyrities. Disease-causing microbes are killed by boiling.  

Posted Date: 9/28/2012 8:23:11 AM | Location : United States







Related Discussions:- Control of environment : water, Assignment Help, Ask Question on Control of environment : water, Get Answer, Expert's Help, Control of environment : water Discussions

Write discussion on Control of environment : water
Your posts are moderated
Related Questions
thesis writing with 40 pages, topic Mapping the criminal mind: Profiling and its limitation''.

how do we arrange element in a periodic table

Life of a Star: A young star is thought  to be composed largely of  hydrogen gas. Hence, the most likely place for a star to be born is in one of  the numerous clouds of hydrog

Heterospermy

3 reasons why Minnesota still has crytosporidiosis

Explain Passive transport or diffusion - Mechanism of Urine Formation Passive transport or diffusion: Diffusion means the random movement of particles in a fluid. The movement

Define Hypoparathyroidism Hypoparathyroidism or a decrease in the secretion of parathormone causes an upset in calcium metabolism. Hypocalcemia develops and the muscles go into

Explain the Physiology of Lactation Lactogenesis is the onset of copious milk secretion around parturition, triggered by a fall in plasma progesterone levels. Although some col

Ventures in Space: Sometimes the atmospheric conditions distort the light or radiowaves coming  in from space. For instance, there may be a storm disturbing the radiowaves. O

Explain the Hyperpnoea It is a term for an increase in the rate and depth of respiration. The cause of hyperpnoea may be voluntary or due to impulses from the hypothalamus.