ExxonMobil corporate affairs director Nick Thomas assures us that
"we are taking steps to reduce and minimise carbon and other greenhouse gas emissions from our own operations. In addition we support approaches to reduce emissions more broadly in ways that are cost effective for society and that consider the uncertainties that remain."
While assessments such as those of the IPCC have expressed growing confidence that recent warming can be attributed to increases in greenhouse gases, these conclusions rely on expert judgment rather than objective, reproducible statistical methods. Taken together, gaps in the scientific basis for theoretical climate models and the interplay of significant natural variability make it very difficult to determine objectively the extent to which recent climate changes might be the result of human actions. These gaps also make it difficult to predict the timing, extent, and consequences of future climate change.
Even with many scientific uncertainties, the risk that greenhouse gas emissions may have serious impacts justifies taking action. The choice of action must consider environmental, social, and economic consequences, as well as recognize the long-term nature of climate change.
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