Deforestation means</h2></div>

Which of the following chemicals is responsible for the depletion of ozone layer in the atmosphere?</h2></div&g…

Which of the following gases is regarded as an atmospheric pollutant?</h2></div>

If global warming continues, organism facing severe threat is?</h2></div>

Measuring 'Biochemical Oxygen Demand' (BOD) is a method used for  </h2></div>

Maximum threat to the world is from</h2></div>

What is algal bloom?</h2></div>

In the long term, which of these saves energy and protect the environment?</h2></div>