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>>We have made a lot of progress in the past decades. More than you probably realize. However, It sounds as if you are blaming everything on the US, and expecting us to pay for everyone else's mess too, because we are the most developed country. Sorry, I don't buy that.
>
>But can you see across LA from trhe nearby hills "on a clear day"?


Sure -- several days a year. Usually in the winter.

L.A. has a partially bad rap for the smog. Part of it is due to the population density and it being a car culture. But another part of it is the chronic "inverted air mass" due to being surrounded by mountains. Phoenix and Denver have the same condition and are also smoggy for much of the year. You just don't hear as much about them.