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Why ozone is known as 'chemical weed ' ?</h2></div>

Polluting strength of sewage is characterised by its</h2></div>

Organic farming does not include ________.</h2></div>

At which of the following places First Global Conference on depletion of Ozone layer was held?<span><br> &lt…

What does a single chlorine free radical destroy?<span><br> </span></h2></div>

Which kind of pollution is caused mainly due to agrochemical waste?

The time taken for solid waste is very _____</h2></div>