Air Pollution in the Last Fifty Years.
Air Pollution in the Last Fifty Years. X8xWq
Air pollution in the industrialized world has had big changes in the last 50 years. Until WW2 the most important polluting stuff was sulfur dioxide combined with crap from the use of fossil fuels in heat and power production. This criminal problem was partly solved by cleaner fuels, higher chimneys and gas cleaning technology in urban areas. But as one door opens another one shuts. The growth of petrol traffic, cars, buses etc, gave rise to emissions of nitrogen oxides and some really nasty organic compounds. However, the biggest problem, if you ask me, is now centered on 1. small particles and 2. organic compounds. Now the problem isn’t in one country but is a global crisis. Air pollutants can last for decades, and go over whole continents. And we get depletion of the ozone layer.
Air pollution in the industrialized world has had
big
changes
in the last 50 years. Until WW2 the most
important
polluting stuff was sulfur dioxide combined with crap from the
use
of fossil fuels in heat and power production. This criminal problem was partly solved by cleaner fuels, higher chimneys and gas cleaning technology in urban areas.
But
as one door opens another one shuts. The growth of petrol traffic, cars, buses
etc
, gave rise to emissions of nitrogen oxides and
some
really
nasty organic compounds.
However
, the biggest problem, if you ask me, is
now
centered on 1.
small
particles and 2.
organic
compounds.
Now
the problem isn’t in one country
but
is a global crisis. Air pollutants can last for decades, and go over whole continents. And we
get
depletion of the ozone layer.
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