Petrol prices for cars should be increased to help fight air pollution in Kent and the UK. <br /><br />That is according to the conservative think tank Bright Blue who also want to see an extra charge on diesel vehicles as well as reducing speed limits in urban areas from 30 to 20mph. <br /><br />In light of this subject, we have been asking shoppers in Chatham whether more expensive fuel prices would stop them from driving all together.