What are the agents that bring about such an undesirable change (pollution) are called?

The worst enemy of ozone is</h2></div>

Describe this topic:<br> Effect of sewage discharge on some important characteristics of a river</h2><div…

<span>Write two ways for disposal of e-waste.</span></h2></div>

A movement similar to Chipko which has spread in South is<span><br> </span></h2></div>

Destruction of ozone can cause </h2></div>

What do global problems mean? Which are the global problems that organisms are facing today?<br> </h2></d…

The atmospheric greenhouse effect is produced mainly by the:<span><br> </span></h2></div>