Take one of these a month...

...and do your bit to reduce carbon emmissions.

Carbon Calculator Insert the distance you regularly travel by car for shopping or work. km

(As a rough guide, 1 mile = 1.609344 kilometers so if your journey is about 5 miles, enter 8 km)

Here's how much Carbon Dioxide you could save by switching just one of these journeys a month from car to bus over a year. kg

Carbon Dioxide Saving Calculation

Emissions per passenger km for buses: 0.0891kgCO2/pass.km (Defra 2007) Average distance of a bus journey outside London: 4.3 miles (6.92 km) (personal communication DfT to First Group). Therefore emissions per journey: 0.0891*6.92=0.617kg CO2/passenger journey.

Emissions for average car: 0.2075 kg CO2/km (Defra 2007) Average loading of a car: 1.58 (DfT 2006, Transport Trends) Average distance (as above): 6.92 km. Therefore emissions per journey: 0.2075/1.58*6.92=0.909 kg CO2/passenger journey.

Volume of 1 tonne of CO2 at standard pressure and temperature: 556 m3.

Source: Defra 2007 Guidelines to Defra's Greenhouse Gas Conversion Factors for Company Reporting, Department for Environment, Food and Rural Affairs (www.defra.gov.uk). DfT 2006 Transport Trends, Department for Transport (www.dft.gov.uk).

Do the right thing take the bus.

Short Haul Flight - 180 (g/pk)
Car - 109 (g/pk)
Bus - 76 (g/pk)

* Grams per passenger kilometre (g/pk).

It makes you think. We use a simple symbol to express the difference between the different methods of transport, measured in grams of Carbon Dioxide per passenger.

You'll notice that buses generally produce 32% less CO2 than cars and 48% less than a short haul flight.