I always think about this even today when an older car passes by - you can really smell the difference between 1980s exhaust filtering and more modern technolog

I always think about this even today when an older car passes by - you can really smell the difference between 1980s exhaust filtering and more modern technology, and imagine how it must have been when all cars smelled that way. So technology is improving, but I'm not optimistic that we will get completely rid of motor traffic in cities in my lifetime...