Introduction It is well known fact that self- sufficiency in food has been achieved in India since late 20th century by using fertilizers and pesticides and exploring improved methods of farming, good quality seeds, irrigation etc. But over exploitation of soil and excessive use of fertil…

About 75% of the solar energy reaching the earth is absorbed by the earth's surface, which increases its temperature. The rest of the heat radiates back to the atmosphere.  Some of the heat is trapped by gases such as carbon dioxide, methane, oxone, chloroflorocarban compounds (CFCs…

Dihydrogen releases large quantities of heat on combustion. The date on energy reased by combustion. The data on energy released by combustion of fuels like dihydrogen, methane, LPG etc., are compared in terms of the same amounts in mole, mass and volume. From this table it is clear tha…

Pathogenesis: The most serious water pollutants are the diseases causing agents called pathogens. Pathogens include bacteria and other organisms that enter water from domestic sewage and animal excretra. Human excretra contain bacteria such as Escherichia coli and Streptococcus faecolis…

Domestic wastes are collected in small bins, which are then transferred to community bins by private or municipal worker. From these community bins , these are collected and carried to tht disposable site. At the site, garbage is sorted out and separated into biodegradable and non- biodeg…