Directions: Fill in the numbered blank (iv) with the best option from those given.

Directions: Fill in the numbered blank with the best option from those given.

Pollution is one of the major ______ (i) ______ to the ______ (ii) ______.  There are many types of pollution like air pollution, water pollution, soil pollution, noise pollution.  We must ____ (iii) ____ towards reducing the pollution.  There are many ways to do this. For example, one can use vehicles and automobiles _____ (iv) _____ on eco-friendly fuels.  One can also ____ (v) _____ the use of polythene bags.  One can even use natural manure in place of chemical fertilisers for the crops.