É assim que se começa


Então e o fumo dos carros que respiramos

Toxic cities mock 'healthy' cycle riding

CYCLING to work may seem the healthy option, but a study has shown that people riding in cities inhale tens of millions of toxic nanoparticles with every breath, at least five times more than drivers or pedestrians.
The research involved fitting cyclists with devices that could count the particles, mostly emitted by car exhausts, in the air they were breathing.
It showed that urban concentrations of nanoparticles, which measure just a few millionths of a millimetre, could reach several hundred thousand in a cubic centimetre of air.
The particles, when inhaled, have been linked to heart disease and respiratory problems.

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