As the replacement of old polluting technology has largely been completed, marginal abatement costs are likely to increase (OECD, 2010). Power production, where emissions were reduced less than in other sectors, became the major source of SOx emissions. Emissions were reduced by 55% from power stations and 28% from industrial combustion through denitrification processes and a decline in solid fuel consumption. However, this achievement was partly offset by an increase of around 40% in road transport emissions as petroleum consumption rose despite fleet renewal.