If 5% of cars really caused 90% of the pollution in the future, then we should certainly banish those cars, shouldn't we? It would be a very informative title.
Only if those were new cars. If electric cars become the norm, then one day 100% of car pollution will be produced by <<1% of cars, but the total will be so low that it won't be worth worrying about those antique internal combustion cars. Percentages can be misleading.
