You don't need London. Just walk through any truck stop on a hot day. It is the accurate definition of stifling. I added some HVAC air intake filters to my FREIGHTLINER and was suitably amazed at how much better it was.
Stingray . . you're too young to remember how bad it was to drive into Los Angeles in the 1960's, it was eyeburning. My folks moved away in the 1950's after a few years of residence, and some on my Dad's side moved away at that same time (after being there since the 1890's) as the air pollution was so bad.
Catalytic convertors worked out pretty well. Yes, I, too, am bummed that overall economy is down with present mandates. I'll live with it. It is my sincere hope that tailored algae can be designed to produce "diesel" that has what we need from it and nothing more.
Doctors and pill companies get waaay too much credit for American's life longevity, anyway. The majority was produced by the "socialism" of mandating sanitary sewers and clean drinking water; moving livestock/abattoirs out of cities. Or, the "socialism" of mass electrification.
The causes of ill health today are "probably" majority environmental. Pollution controls on new vehicles mean I'm not making a mess for someone else to clean up . . and denying the benefit gives corporations (and government; see Rocky Flats, etc) the philosophical argument that their "profit" should always come at the "expense" of society . . that would be more of the "trickle-down", ah, theory.
I cannot see being in favor of open waste streams, THAT should be closed from hereon. I need the service of a private vehicle . . but no one else need suffer from that choice (beyond what we, openly, decide as a society is acceptable risk).
1990 35' Silver Streak Sterling
; 9k GVWR.
2004 DODGE Cummins 305/555; 6-manual; 9k GVWR.
Hensley Arrow. 10-cpm solo, 18-cpm towing
Sold: Silver Streak Model 3411