13 May 2004: The Institute of Advanced Motorists has published a series of guidelines to promote ecologically-friendly driving habits.
The guidelines note that journeys of less than two miles cause the most pollution. A straining cold engine will produce 60 percent more pollution than a warm one.
Drivers should also take the most direct route and go off peak if possible, as well as thinking about car sharing, Park and Ride schemes or public transport.
Under-serviced engines can reduce fuel economy by ten percent or more, the hints remind, while correct tyre pressures will keep economy up. Doing 56 mph uses 25 percent less fuel than 70 mph and a smoother driving style can bring significant fuel saving.
Roof racks and carriers when not in use are creating unnecessary drag, and driving with the window open also increases drag and lowers fuel economy.