From imported pollution dropping from our skies to a build-up of local emissions, the air we breathe is becoming increasingly unhealthy. … 
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          A major new study from Harvard University shows that there is a direct relationship between the amount of ultra fine particles in the air and how people perform in mental tests. The more polluted the air, the worse people perform. … 
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          Removing indoor air pollution has proven benefits. Not just the obvious advantages of protecting your health from bacteria, viruses and allergens, while minimising sick building syndrome.  … 
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