Yes, the council seems to be a law unto itself- the 20mph speed limit increases fuel consumption thereby raising carbon dioxide emissions. Petrol vehicles have increased NOx emissions as well- the only reduction is the PM10 particulates which are reduced at 20mph compared with 30 mph. Getting rid of trees which mop up carbon dioxide will also increase CO2. Whenever I am driving at 20mph on the wider roads people overtake me, even at night, and that puts pedestrians and cyclists at greater risk.....