Most 1999 environmental data show positive progress. Greenhouse gas emissions were down by over 10% from 1990, beating a corporate target by two years - though the company admits this was partly due to reduced refinery activity. The report also lists Shell's emissions of all six Kyoto protocol greenhouse gases for the first time, putting the total at 99m tonnes of carbon dioxide (CO2) equivalent in 1999. Shell forests were estimated to have sequestered some 700,000 tonnes of CO2 during the year.
Emissions of methane, nitrogen oxides and sulphur dioxide were all down, mainly due to lower waste gas flaring and energy consumption. The oil content of discharges was down 37% compared with 1998. The main negative trend reported was an increase in the total volume of oil and other types of spills.
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