Came across this
"A crackdown on wood burning stoves is at the centre of a Government drive to reduce air pollution as ministers deem it the UK’s biggest environmental threat to human health.
Under a new clean air strategy to be announced on Tuesday, wood burners that pump out too much smoke will be banned from sale, along with certain types of car tyres and brakes, cleaning solvents, fertilisers and solid fuels."
It would be interesting to watch the present coalition in NZ tie itself in knots over the same subject! Certainly we notice the pollution a lot in Wairarapa towns over winter.