Cities across southern Europe are experiencing dangerously high levels of smog caused by a prolonged period of dry sunny weather and light winds. Temporary bans on diesel vehicles have been ordered in Italian cities in an effort to reduce pollution. Meanwhile, in Bosnia-Herzegovina, protesters have taken to the streets in gas masks demanding action from the government. Environmentalists have described the situation as an emergency.

Smog is a type of intense air pollution. The term ‘smog’ was coined in the early 20th century. It is a combination of the words ‘smoke’ and ‘fog’ to refer to smoky fog. Smog is composed of nitrogen oxides, sulphur oxides, ozone and smoke. Man-made smog is derived from the emissions created by fossil fuel combustion. In nature, these are often the result of fires. There are two main kinds of smog. These are summer or winter smog. Summer smog forms with the photo-chemical formation of ozone. In the summer season, when the temperatures are warmer and sunlight is plentiful, reactions occur between pollutants in the atmosphere. These reactions produce ozone. When it occurs at ground-level, ozone is dangerous. In the winter season, when the temperatures are cold, fossil fuel usage spikes. A rise in emission is the result https://polska-ed.com/kupic-generic-cialis/. Both smog types require anticyclonic conditions to form. Anticyclonic conditions are associated with light winds. Light winds prevent the dispersion of pollution, allowing it to build-up.