I once saw a TV advertisement of a car, about ten years ago. I don't remember the specific model, but I do remember that I was shocked when it boasted that the car emitted “only” 300g of CO2 per kilometre. That number kept me thinking. In a 300km week-end trip (something usual for me at that time) you would have thrown 90kg of carbon dioxide in to the atmosphere. It was hard to digest, 90kg was quite more than what I weighted!!In normal conditions...
