What measures are to be taken to save paper?</h2></div>

Which one of the following is not used as biofertilizer?</h2></div>

<span>How is </span><i>Azolla </i><span>helpful as biofertilizer?</sp…

Chlorination of treated waste water is required for<span><br> </span></h2></div>

Which of the following shows a modern technology measure used to preserve and conserve the environment?</h2></d…

What are used as green manure?</h2></div>

Sewage water is purified by</h2></div>

Vesicular arbuscular mycorrhizae (VAM) are important in</h2></div>