We all know that using air conditioning in our vehicle increases fuel consumption. But here are some other facts that may help you make the choice to turn it down.

Of all the power-consuming accessories in a vehicle, the A/C is the worst offender, resulting in increased fuel consumption and higher CO2 emissions. Factors such as a vehicle's interior size and outdoor temperature can affect exactly how much more fuel you'll use; but when it's on, fuel consumption can increase by up to 20 per cent in the city.

Here's how you can help:

. Chill out and turn it off Consider whether or not you really need the A/C for cooling.

. Hit the re-circulation button

Consider using the "recirculating" function. This requires less energy since your vehicle is not always cooling warmer air from the outside.

. Go with the air flow Consider using flow-through ventilation when highway driving and open your windows and sunroof while driving in the city.

Natural Resources Canada has some other tips for fuel-efficient driving at www.nrcan.gc.ca.

www.newscanada.com