It's that time of year again when my stream is full of images of dangerous metal particles, toxins and chemicals being pumped into the air above London.
Arsenic, strontium, barium, rubidium, cadmium, manganese, sodium oxalate, aluminium, copper, iron dust powder, potassium perchlorate, sulphur dioxide, carbon monoxide and particulates, quite apart from all that smoke in the heart of the ULEZ.
Millions spent on trashing the environment and yet barely anyone contests it.