*DISCLAIMER* This is wildly unscientific!
I am a fairly environmentally aware chap.
I cycle most place I need to go within 10 miles of home.
I recycle any waste from the house I reasonably can.
I have energy saving light bulbs everywhere.
However I am in a quandry. I want a BMW M3.
So I did some research and thought this may be of interest.
A new car takes on average 1.2 tonnes of CO2 to produce (not including electricity or steel and aluminuim manufacture). This can be rounded up to 2 tonnes to include all these hidden factors and transportation to the dealers forecourt. A hybrid takes more as fuel cell manufacture is one of the most energy intensive process' currently being undertaken (thought his will improve with better technology in the future).
A 'eco friendly' Toyota Prius is rated at 114g co2/km. (2007 model)
A BMW 3.2 M3 is rated at 287g co2/km. (2001 model)
Last year I travelled 12500 miles by car (20116km)
By Prius this would generate 2293224g co2 or 230kg for easy numbers.
By M3 this would generate 5773292g co2 or 578kg for easy numbers.
Therefore it would take a Prius nearly 9 years to emit the same pollution as created by it's manufacture.
Though it would take the M3 only 3 and a half.
However as the M3 already exists I can argue that the M3 starts with 2 tonnes in the bank so to speak, therefore a new Prius would take quite a while to catch up!
Add to this the fact that I have old bikes too and I can feel a little bit pleased. Not so smug now is the dude with the Prius and the brand new bike!
I am of course aware that I could reduce my carbon footprint a lot more by buying a used small car but the point is that you can have your cake and (providing you are willing to be a little responsible) eat it!
Go green, go M3!
Somerset, like 'Heartbeat' with newer cars!
Retro MTB: 1992 Cannondale 3.0 Deore XT M730. 1992 Marin Pine Mountain Deore DX M650.
Retro road: 1992 Eddy Merckx Corsa Extra Telekom Shimano 600 STI. 1993 Dyna Tech Ti.
Modern: 2006 Wilier scandium Ultegra 6600. 2014 Wilier GTR Ultegra 6800.