Which of the following is non-biodegradable?<br> </h2></div>

High BOD indicates</h2></div>

Which of the following organism is likely to have more concentration of D.D.T in its body?</h2></div&g…

Major source of emissions in a motor vehicle: crackcase, carburettors, fuel tank and<span><br> </span>…

Excessive exposure of humans to UV-rays results in</h2></div>

Write name of any two green house gases.</h2></div>

Write the unit used for measuring ozone thickness.</h2></div>

Which of the following options is a major water pollutant nowadays?</h2></div>