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Thats a big deal though for those living in an urban environment. While you may be shifting emissions from tail pipe to power station, power stations are generally located with far fewer receptors and with far greater dispersion of the pollutants. It still isn't great but it is better for many people with breathing issues.
greentricky-
You're smerging air quality and co2 with that statement. See my previous comment.
A gas fired power station is not a major source of air quality type pollutants, but does pump out loads of climate change causing co2.
A diesel or petrol car manages to pump out both co2 and particulates and gasses that cause problems for human health.
Its really important that people understand the difference between Air Quality and CO2. Its the entire reason diesel was iniyally pushed (lower co2 than petrol) but now hated (generally worse for AQ).
Scrabble
I have heard lots of quotes about how electric cars have a massive impact on air quality and the environment, but as far as I can see it is a selling point and not based in fact. There are no exhaust emissions at a local level, and that's it. They have batteries and lots of technology that is extremely carbon and or energy dependent to make, and which has a finite lifespan.
Here's one report into the comparison