Greenhouse Gas Emissions from Motor Vehicles

פורסם: 17 במרץ 2010, 12:11 על ידי: Sustainability Org
Motor vehicles emit greenhouse gases, which contribute to climate change. Not all vehicles have the same impact. In vehicles, the principal greenhouse gas is carbon dioxide (CO2), but vehicles also produce the greenhouse gases nitrous oxide and methane. The vehicle's level of CO2 emissions is linked to the amount of fuel consumed and the type of fuel used.

The road transport sector depends on petroleum based fuels. Growth in the Australian road transport task has led to a corresponding increase in fuel consumption, which in turn, has led to an increase in greenhouse gas emissions from the sector. In 2006, road transport accounted for 12% of Australia's total greenhouse gas emissions. Greenhouse emissions from road transport have been increasing at an average rate of 1.7% per annum since 1990.

The Australian Department of Climate Change maintains Australia's National Greenhouse Accounts which has more information on the emissions of greenhouse gases in Australia.

Greenhouse Rating

On the Green Vehicle Guide, a higher Greenhouse Rating means the car produces lower levels of carbon dioxide (CO2). All new vehicle models up to 3.5 tonnes gross vehicle mass sold in Australia are tested to determine both fuel consumption and the level of CO2 emissions emitted. The test produces 3 results for fuel consumption and CO2 emissions - the 'urban', 'extra-urban' and 'combined' values. The combined CO2 emissions value is used to derive the Greenhouse Rating of a vehicle as illustrated in the table below. This information is also displayed on the Fuel Consumption Label attached to the windscreen of new vehicles.

Greenhouse Rating

CO2 Emissions
(combined g/km)

Greenhouse Rating

CO2 Emissions
(combined g/km)

<= 60 241 - 260
61 - 80 261 - 280
81 - 100 281 - 300
101 - 120 301 - 320
121 - 140 321 - 340
141 - 160 341 - 360
161 - 180 361 - 380
181 - 200 381 - 400
201 - 220 401 - 420
1 star 221 - 240 2 stars 421 - 440
    2 stars >440

Fuel consumption label

Most people are aware that vehicle exhaust causes air pollution, commonly referred to as smog. Pollutants such as carbon monoxide, hydrocarbons and particulates (black soot) are released from the exhaust and affect the quality of the air we breathe. Driving a car also contributes to another environmental problem: the greenhouse effect.

Fuel Consumption Label

About the label

The Fuel Consumption Label is an Australian Government initiative to promote consumer demand for vehicles with good fuel efficiency and lower greenhouse impact. All new vehicles up to 3.5 tonnes gross vehicle mass sold in Australia, regardless of fuel or body type, are required to have a Fuel Consumption Label on the front windscreen. This includes passenger cars, four wheel drives and light commercial vehicles.

The label indicates how many litres of fuel a vehicle will use to travel 100 kilometres and how many grams of carbon dioxide the vehicle would emit for each kilometre. The rating is based on a standard test procedure so you can reliably compare the performance of different models under identical conditions.

The lower the numbers, the better the vehicle.

Encouraging consumer preferences toward vehicles of greater fuel efficiency will help reduce greenhouse gas emissions from transport. In addition, introducing mandatory CO2 labelling will raise consumer awareness of the role fuel efficient vehicles play in helping to reduce greenhouse gas emissions and the relative impacts of different fuel types.

It should be noted that, while the fuel label provides standard fuel consumption and CO2 figures for comparing different vehicles, it should only be regarded as a guide. You may experience different results when actually driving the vehicle because the fuel consumption of a particular vehicle will depend on what traffic conditions it is driven in, how you drive the vehicle and how well the vehicle is maintained.

Green vehicle guide

The fuel consumption and emission figures provided on the labels of all vehicles are also listed in the Green Vehicle Guide.

Find out more

The Fuel Consumption Label scheme is administered by the Department of Infrastructure, Transport, Regional Development and Local Government. Find out more about the label:

The standards for fuel consumption labelling are specified in Australian Design Rule 81/02 Fuel Consumption Labelling for Light Vehicles. Further information on Australian Design Rules and the Motor Vehicle Standards Act 1989 and can be obtained from the Department of Infrastructure, Transport, Regional Development and Local Government at: