greenhouse gases goes a deterioration in air quality. I suspect that many of
you have traveled to some of the world’s megacities and be appalled by what
passes for ambient air. Ten years ago I flew to Santiago, Chile for a
conference and was amazed when the pilot had to make an instrument landing –
at noon on what was supposed to be a clear day. Once on the ground it was
clear what the problem was – the air was as much a liquid as a gas, and
breathing was a challenge. More and more of our cities suffer from this
condition. Is it surprising that asthma is epidemic?