<P> For the past few years , cities in northern India have been covered in a thick layer of winter smog . The situation has turned quite drastic in the National Capital , Delhi . This smog is caused by the collection of Particulate Matter ( a very fine type of dust and toxic gases ) in the air due to stagnant movement of air during winters . </P>
<P> For the past few years , cities in northern India have been covered in a thick layer of winter smog . The situation has turned quite drastic in the National Capital , Delhi . This smog is caused by the collection of Particulate Matter ( a very fine type of dust and toxic gases ) in the air due to stagnant movement of air during winters . </P>
the smog in cities in india mainly consist of
the smog in cities in india mainly consist of
Particulate Matter ( a very fine type of dust and toxic gases )
Particulate Matter ( a very fine type of dust and toxic gases )