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
Rejection of Heliocentrism: This happened  in the year  1918 when the astronomer Harlow Shapley (1885-1972) first surveyed the size and shape of  the Milky Way Galaxy. He  sh

Define Protein Hormone and Steroid Hormone Further, hormones are of two different chemical types - protein hormone and steroid hormone. Most of the hormones belong to the categ

Objectives After completing this exercise you will be able to: 1. Sterilize and dispose off microbial cultures, 2. Dispose off the carcass of laboratory animals and the e

make a list of food item used at home .categorize them as healthy food [energy giving, body building and protective food] and unhealthy food [fried and greasy]

QUESTION 1 (a) How did psychology emerge as a separate scientific field? (b) Elaborate on any two schools of Psychology QUESTION 2 Elaborate on the correlational met

how can change the image to array

Explain the Conditions for Ventricular Fibrillation Ventricular fibrillation may be seen in the following two conditions: 1) When a person is electrocuted, and 2)  As a c


Monosaccharides and amino acids are absorbed into the blood in the intestinal capillaries. Is it true or False?

What is happening to the length of a day on the Earth, as a result of the gravitational pull of the Moon?