Beyond Petroleum - Beyond Probability

Buried in amongst the financial pages of The Guardian, I picked out this little nugget about BP.
Last week they produced a report saying that the 'estimate of the carbon dioxide produced by its products was 606m tonnes of CO2 equivalent in 2004.' However, in a report last year, they declared that the carbon dioxide produced was around '1,376m tonnes of CO2'. Strange how that figure has changed. Anything to do with their image perchance? It's interesting to discover the truth about their aspirations to be an environmentally friendly corporation. I think they have some way to go on this evidence. They also have some way to go before they can convince me to start buying my petrol from them.