I just got back from Barcelona, and was surprised by the level of air pollution. The smog never disappears, even after a heavy rain. I learned that Barcelona ha

I just got back from Barcelona, and was surprised by the level of air pollution. The smog never disappears, even after a heavy rain. I learned that Barcelona has never met EU minimum air quality standards since they were established 22 years ago. And all cars and trucks run on diesel. If I were planning their transportation future, I'd be looking to be the earliest adopter of electric transport in Europe. Super blocks appeal to me, but they don't address the air quality issue directly enough to really excite me.