Which of the following is correct regarding 'El Nino' effect?</h2></div>

Solid waste are disposed in a coastal areas, having a deep sea water in<span><br> </span></h2>&l…

What is Ozone layer? Explain the effects of the depletion of ozone layer.</h2></div>

Write the full form of BOD.</h2></div>

Name the gases which cause acid rain.</h2></div>

BOD of wastewater is amount of</h2></div>

Among these metals given below, which is the most valuable recyclable component of a printed circuit board?</h2>&l…

Name the city in our country where the entire public road transport runs on CNG.</h2></div>