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In an effort to better understand the interactions between economic activity and the environment, this report computes the CO2 emissions caused by French domestic demand in 2005, taking into account both the national productive system as well as any activities abroad, such as imports. The aggregate figure calculated amounts to just over 550 million tonnes (9 tonnes per year per inhabitant). This number is then broken down to show that 75 percent of these emissions are produced by household consumption expenditure, mainly on housing, transport, and food; 10 percent are produced by general government consumer expenditure; and 15 percent by investment.