Describe this topic:<br> Effect of sewage discharge on some important characteristics of a river</h2><div…

Which of the following statements is correct?   </h2></div>

World ozone day is celebrated on __________</h2></div>

  <span>Which among the following is a major cause of water pollution?</span></h2>&l…

Waste which arise from household, institutions, markets and other activities is known as<span><br> </span…

Some of the major contaminants of water are:<br> </h2></div>

Increasing skin cancer and high mutation rate are due to _________.<br> </h2></div>

Which of the following is not a water pollutant?<br> </h2></div>