Thanks for this, I think this backs up my point, we should reduce emissions to improve air quality generally.
Trying to do so on the single basis of CO_2 and global warming seems to not take in to account the effects of air pollution on a more local level.
How we do this is up for debate, I think we need more green public transport, proper debates on the whole lifecycle of the fuel / transport (where does the fuel come from)
Encourage more use of walking / cycling etc.
Solve small problems on a local scale will eventually have a global impact that is better for everyone.