BOD level in fresh water should not exceed beyond</h2></div>

Which of the following is an example of pollutants whose concentration increases in each trophic level?

Temperature is generally increasing making the earth a hot plate. Mention any two measures to control global warming.&lt…

An important product in the ozone depletion by chlorofluorocarbons is:</h2></div>

What gases are involved in ozone depletion?<span><br> </span></h2></div>

Disease caused due to increases particulate pollutant in air</h2></div>

How burning of fossil fuels leads to increase in global warming?</h2></div>

............ is a man-made source of air pollution.</h2></div>