Well I prefer not to see or hear about the heinous knife crimes on a daily/weekly basis, which does alter the climate so far as having peace in our time is concerned.
The more crimes, the extra use of all facilities including cars/ambulances and in some cases fire-engines-------all adding to the " unnecessary " pollution caused by the continuous responses from these vehicles, cars stopping and starting to let them pass.
Until people stop using cars there'll always be a problem as has been proven with the number of children living in/near towns and cities who've developed asthma.
People dropping off children to school, who only live 10 yards away, they're the ones, in their " tanks " who need lecturing.