Fast E.V. Charging.

Dave,

Air pollution is an interesting question. I have looked at it in two ways:


1) Air quality. Without considering health issues combustion engine exhaust is not pleasant. City streets with high buildings or mountain passes with an inversion layer quickly fill up with fumes. The smelly parts may or may not be a health hazard but reducing or elimating them makes for a better quality of life. Does that have a price?

2) Health issues. The various reports suggest that air pollution results in shorter life spans and other health problems. I cosider this to be correct for high levels of pollutants, London smogs of the past or cooking over an open fire in an unventilated building. What is not clear is if pollution effects are LNT (Linear No Threshold) or if there is a safe limit for various pollutants. If the LNT model is used then 'collective dose' models are also used. If one person receives a lethal dose they die. If 1000 people receive 1/1000 of the lethal dose one of them will die. Is this valid?  There was a report in ET last year on Londons low emission zone and the lack of the expected health benefits:
https://eandt.theiet.org/content/articles/2018/11/london-s-low-emission-zone-failing-to-improve-residents-health/

Maybe the models are wrong, maybe we have reached the threshold were minimal further improvements are possible or maybe vehicle emissions are not the problem?


I would rather be walking alongside a line of electric vehicles than a line of combustion engined vehicles but can I justify the investement in money and secondary pollution caused by the manufacture of EVs?


Best regards


Roger

Dave,

Air pollution is an interesting question. I have looked at it in two ways:


1) Air quality. Without considering health issues combustion engine exhaust is not pleasant. City streets with high buildings or mountain passes with an inversion layer quickly fill up with fumes. The smelly parts may or may not be a health hazard but reducing or elimating them makes for a better quality of life. Does that have a price?

2) Health issues. The various reports suggest that air pollution results in shorter life spans and other health problems. I cosider this to be correct for high levels of pollutants, London smogs of the past or cooking over an open fire in an unventilated building. What is not clear is if pollution effects are LNT (Linear No Threshold) or if there is a safe limit for various pollutants. If the LNT model is used then 'collective dose' models are also used. If one person receives a lethal dose they die. If 1000 people receive 1/1000 of the lethal dose one of them will die. Is this valid?  There was a report in ET last year on Londons low emission zone and the lack of the expected health benefits:
https://eandt.theiet.org/content/articles/2018/11/london-s-low-emission-zone-failing-to-improve-residents-health/

Maybe the models are wrong, maybe we have reached the threshold were minimal further improvements are possible or maybe vehicle emissions are not the problem?


I would rather be walking alongside a line of electric vehicles than a line of combustion engined vehicles but can I justify the investement in money and secondary pollution caused by the manufacture of EVs?


Best regards


Roger