lo_pak

It's lucky the sea is nearby, otherwise the air pollution is even worst for the inland.

lo_pak

回復 4# tiffiant

Normally wind will blow from the sea towards the land (better air circulation)...

lo_pak

回復 6# tiffiant

Not really.
Heavy polluted particles will drop once precipitation;
Light polluted particles/volitile gas will follow air current.
In normally days wind are strong blowing inland from the sea trapping pollutants on the coastal area.

lo_pak

回復 9# tiffiant

Precipitation is rain, snow, hail... etc.
That's why everytime after rain you feel the air is fresher...
For any pollutants that're heavier than air by density, they will go nowhere but falling down eventually. It's just a matter in time...
For heavily polluted air, eg. industrial area, you may always heard of the term "acid rain", it is harmful.
However, the condition is well depends on the weather. Since precipitation is a pretty well buffer system, water falls on the ground is usually "neutral", so to speak.

lo_pak

Heavy polluted particles = precipitation
so, should we touch the rain/precipitation?
tiffiant 發表於 2010-9-28 21:15

Heavy polluted particles "DOES NOT" = precipitation.
It should be the precipitation "washed out" those heavy polluted particles just like you are cleaning out dirt with water...

lo_pak

回復 13# tiffiant

Mostly, water is a very good solvent/media...

lo_pak

回復 15# tiffiant

Don't quite get what you are really asking? Can you make it clear?

lo_pak

回復 17# tiffiant

Look at Mars... Once upon a time there is water...

lo_pak

Air pollution is one big problem associated with modernized cities. Motor vehicles, power plants, air conditions,... etc. All burning fossil fuels that emit heat, carbon dioxide plus other different pollutants.

lo_pak

回復 30# somewhereintime

You are picky... Don't try to compare the fresh air in Vancovuer with other places...