I have been reading 39 Ways To Save The Planet by the BBC journalist Tom Heap, which includes such ingenious suggestions as capturing refrigerant gases in a large box and then destroying the large box. It is an interesting book. I would like to suggest to Tom a 40th way in which we might help to save the planet, as well as saving the country a lot of money: raise the minimum age at which a person can drive a car from 17 years to 25 years.