everybody in London is breathing toxic levels of PM2.5 particles [treehugger.com]. And the fact that the largest sources of PM2.5 particles are tires and brake dust suggests that electrification is at best only a partial answer.
We also have to drive a whole lot less.
Fortunately, London appears to be pursuing an all-of-the-above strategy when it comes to greener transportation, including electric buses [treehugger.com] to a massive investment in cycle infrastructure [treehugger.com], the goal really does appear to be easing gridlock and rethinking how we get from one place to another.
London's cycle superhighways have already shown they can deliver 70% increases in cycling [treehugger.com], and now Mayor Sadiq Kahn has announced an entirely new, fourth superhighway [treehugger.com] bringing segregated lanes to Southeast London for the first time.
Instead of car tire and brake dust, Londoners will be able to inhale healthier bike tire and brake dust.