I didn't get my licence until mid-30s because I was living in London, so I didn't pay that much attention at the time, but I do remember leaded petrol.
IIRC, there was a big hoo-har over the switch, with plenty of nonsense about rubbing an eraser around the inside of your engine... But IIRC, it transpired that most cars could run fine on unleaded and leaded wasn't needed. Something about catalytic converters being both a good and bad thing, but I think they only hampered performance on leaded fuel...?
I also believe adding a Cat was the way forward for people, which is FAR cheaper and less punishing than dropping my annual salary on a whole new car that I'll probably hate anyway...
But then many very old cars are still driven around on today's fuels, so was leaded to unleaded really that big of a thing?
As I recall, VAG were the first to be discovered and so got all the hate, but several other manufacturers were guilty of the exact same thing... they were just able to quietly make alterations while VAG were getting hammered for it?
How many deaths, by comparison, are caused by those same cars running people ove or crashing into other vehicles?
How many other people are killed by other pollutions and what percentages of general pollution do those other pollutions represent?
Nobody will care until affordable, viable replacements are available.
Can't walk, no pavements where I live.
Wouldn't want to cycle, traffic too fast and road unlit.
No public transport for 6 miles.
Cars and motorcycles for the win...