What are the sources of water pollution? What steps could be taken to prevent water pollution?</h2></div>

Air pollution takes place in two different layers of the Earth's atmosphere: _______ and __________.</h2></div&…

How much percent of impurities are enough to make domestic sewage unfit for humans?

List any four effects of global warming.</h2></div>

Why is CNG (Compressed Natural Gas) preferred over petrol?

Which of the following contributes the most towards deforestation?</h2></div>

In the polluted water, the values of</h2></div>

Which of the following are caused due to the unplanned clearing of land?<br> (i) The destruction of habitats<br…