= Key performance indicators.

N/C = Not calculated.

[A] Petroleum Industry Guidelines for Greenhouse Gas Estimation, December 2003. (API, IPIECA, OGPI) indicate that uncertainty in greenhouse gas measurements can be significant depending on the methods used.

[B] Restated from 323 thousand tonnes due to calculation error in one of our Nigerian operations.

[C] 2006–7 data restated since the publication of our 2007 Annual Report and Form 20-F as a result of investigations into incidents in a difficult to access area that were completed in the interim.

[D] From 2007 we have aligned our definition of a spill with the industry standard. Only hydrocarbon spills are now included in the data.

[E] Restated for all years to exclude cooling water that travels only once through the plant.

[F] Restated from 1,582 due to inclusion of additional hazardous and non-hazardous soil into these categories by some downstream operations.

[G] Increase in 2007, mainly a result of non-hazardous waste. Two-thirds of the rise came from our upstream business in the USA due to the closure and clean-up of onshore well sites, where we bought a large brownfield operation. The rest came mainly from construction and demolition of retail sites, bought and sold by our downstream business.

[H] In 2007, we made our minable oil sands activities in Canada, a separate segment within our downstream business. It was previously part of Exploration & Production. We now report the energy intensity of oil sands separately.

[I] 2003–5 figures adjusted for the removal of oil sands activities from Exploration & Production.

[J] The Reputation Tracker survey is conducted on our behalf in 14 of our major markets, by the independent market research agency Ipsos MORI. In 2007, we reduced the number of markets where we use the Reputation Tracker with the general public, as the results from them are no longer representative we no longer report them externally. The response scale was changed for “external perception of environmental performance” in 2007. This prevents direct comparison of those results with previous years’. Comparisons can be drawn regarding the gap between Shell and its nearest competitor.