BOD of two samples of water A and B were 120 mg/l and 400 mg/l respectively. Which sample is more polluted.</h2>&l…

A rapid growth of photosynthetic algae in water develops 'bloom'. How would it affect the environment of water?</h2&g…

The permanent removal of forests and woodlands is called</h2></div>

Wastes may be sealed in concrete-filled drums and discharged to a depth of about 500 m. This specific statement is true …

Which device is/are used to control <span class="katex"><span class="katex-html" aria-hidde…

The main factor responsible for the depletion of ozone layer is addition of _____in the atmosphere.</h2></div&g…

_______ waste includes waste from labs, medical origin etc.</h2></div>

Why ozone hole forms over Antarctica? How will enhanced ultraviolet radiation affect us?</h2></div>