Lung disease are four times more in Urban areas than Rural area. This is due to the presence of which

Lung diseases are four times more in urban areas than in rural areas. This is due to the presence of

Lung diseases arc four times more in urban areas than in rural areas. This is due to the presence of

Lung diseases are four times more in urban areas then in rural areas. This is due to the presence of

Lung diseases are more in urban areas than in rural areas.

Lung diseases are about four times more probable in urban areas as compared to rural areas . This is due to the presence of which of the following in atmosphere ?

Lung diseases are about four times more probable in urban areas as compared to rural areas . This is due to the presence of which of the following in atmosphere ?