(1) As a source of smog and a severe global warming aggravator, coal is still king.

(2) The infamous London smog is an example of extreme air pollution.

(3) The rain has a way of cleaning the dust and smog out of the air making things appear especially vivid and clear.

(4) If there is a quantity of smoke or other airborne pollutant particles present, it is known as smog .

(5) Mowing a lawn for half an hour with a gasoline engine makes as much smog as driving a new car 170 miles.

(6) Exhaust fumes from cars and factories make for a toxic, suffocating smog that hangs over the city.

(7) In the Green, not the smell of cut grass and flowers, but rather the stink of traffic smog and semi stagnant water in the pond.

(8) Exhaust emissions are mainly responsible for the smog

(9) All I remember in the air in 1977 was smog from all the coal-burning chimneys.

(10) In the city the snow had long lost its Persil whiteness, and seemed bruised by the dirt and smog that seeps into everything here sooner or later.

(11) Ethanol has also been found to contribute to smog in arid climate due to its volatile nature.

(12) As I look out of my window now, I see a layer of thick smog clinging to the buildings around the city.

(13) Lavanya cannot believe our clear atmosphere after London smog and fog, the huge horizon and the sunsets.

(14) Cars and trucks are major contributors to smog which is a serious health problem in Central and Eastern Canada.

(15) He looked up at the sky, but the clouds and smog obstructed the view of the stars.

(16) The Bay of Naples is still breathtaking if you can see it through the smog and the smoke from Vesuvio.

(17) Since sunlight and heat are precursors of smog , the hot weather makes air pollution worse.

(18) And when the heat has nowhere to go it reacts with pollutants, such as car fumes, to cause smog .

(19) The size and shape of the various buildings can also affect wind patterns, causing perfect conditions for smog to occur.

(20) People in Tanzania cook using firewood at home with smog around them.