The Why, How and Where of Irish Air Pollution
“This most excellent canopy, the air, this brave o'erhanging firmament, this majestical roof fretted with golden fire, why, it appears no other thing to me than a foul and pestilential congregation of vapours. What a piece of work is a man!”
Hamlet Act 2, Scene 2. William Shakespeare
Why do particulates matter?
We have known for many years that carcinogenic chemicals and much smaller particulate matter (PM) than soot are produced by the combustion of fossil fuels. The small solids, termed PM2.5, are invisible to the naked eye but can kill with long-term exposures.
PM is a complex mixture of extremely small particles and liquid droplets that is made up by a number of chemical components including acids (like sulfuric and nitric), organic compounds (some carcinogenic), elemental carbon (soot) and metals (like lead). So the materials involved are mainly quite toxic. The composition...
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