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Greenhouse gas emissions estimation and inventories: addressing uncertainty and accuracy

October 2007

The uncertainties inherent in the data used for emission inventories may affect their credibility and the acceptability of assertions of greenhouse gas (GHG) emission reductions. The uncertainty of an oil and gas company’s GHG emission inventory, or of its quantified emission reductions, is determined by the uncertainties of the estimates of their key (largest) contributing sources. In turn, each of these emission source uncertainties depends on the quality and availability of sufficient data to estimate emissions, or on our ability to measure emissions and properly account for their variability. This workshop addressed these concerns and considered methodological aspects from the point of view of both regulators and industry.

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