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many common methods are employed for the removal of impurities from water. some of them aresedimentationfiltrationreverse osmosiselectro
water is widely used in various process applications in industry. other major industrial uses are boiler feed water and cooling water. the king and
the modern water treatment plan is often called upon to perform wonders with the water fed to it. the clear safe even tasteful water that comes
after glaciers ice caps and snowfields ground water is the next largest fresh water reservoir. precipitation that does not evaporate back into the
most of the surface water originates directly from precipitation in the form of rainfall or snow. ground water from springs also contributes to the
the oceans and absorb solar radiations. there exit a temperature difference between surface and deep ocean water. ocean thermal energy conversion
it is that energy which lies embedded within earths crust. in some places heated water comes out through the surface of earth as hot spring or
biomass energyenergy produced by burning biomass it is known as biomass energy. when biomass is burnt it releases stored chemical energy which has
tidal energythe periodic rise and fall of water level of sea is called tides which are caused by gravitational effect of moon combined with the
wind energy wind power is one of most cheapest renewable energy sources today. wind turbines convert the
energy from water or hydropower hydroelectricity is the energy produce from the kinetic energy of water
advantage of solar energy1. it is renewable it produce comes from sun so it is plentiful and will always be there as
it is an inexhaustible and population free source of energy. this energy maintains temperature of the earth. it causes current in the atmosphere and
capacity to do work is known as energy. it is very important input for all our activities like cooking food driving vehicle and running industries.
the effects of unlimited population growth are as follows1. increase in unemployment.2.
some of the reason for increase in population is1. decline in death for an increase in life expectancy or
in 1798 british economist and demographer thomas robert malthus published his essay on population in which he stated that1. population
increase in population size is known as population growth. it depends upon number of persons added to the population and number of persons lost from
introduction the term population is derived from lation word populus meaning people. population is a group organism of same in a particular is at a
diversity is defined as the no of species present in a community termed as species richness. we can represent species biodiversity at different
conservation of biodiversity is very important to maintain the ecological balance of ecosystem.various steps for conservation of
these are some important uses of biodiversity.1. source of food medicines and drugsa wheat rice and maize are three
i genetic bio- diversityall forms of life on earth contain genes. genes are carrier of hereditary characteristic from one
the capacity to do work is known as energy. in an ecosystem energy flows through one organism to another in the form of food. the flow of energy is