photochemical smog betydelse and definition

Exempel på photochemical smog

• Photochemical smog mechanism, ill-effects and control.

• The mechanism of photochemical smog.

• There, gridlock occurs now on an almost daily basis and the city swelters under an ever present cloak of photochemical smog.

• The effect that we call acid rain is a photochemical smog created by a combination of sulphur dioxide, nitrogen oxide, hydrocarbons and ozone.

• This is a secondary pollutant formed when nitrogen oxides mix with hydrocarbons from vehicle exhausts in the presence of sunlight—the infamous photochemical smog.

• There is no evidence to suggest that photochemical smog is a significant hazard in this country.

• There can be ozone but no photochemical smog.

• Substitutes also include propane and butane, which may contribute to photochemical smog in a very small way.