pt. 1. Effects of acid and acidifying depositions. Effects of acid and acidifying compounds on materials used buildings, monuments and artefacts of historical and cultural significance -- pt. 2. Technologies for controlling sulphur and nitrogen emissions. Desulphurization of fuels -- Low-emission combustion processes -- Flue gas desulphurization (FDG) -- Utilization of recovered materials and disposal of waste products from desulphurization technologies -- Technologies for removal of NOX and combined removal of SO2 and NOX -- Conclusions and recommendations on technologies for controlling emissions of sulphur and nitrogen oxides from stationary sources -- pt. 3. Cost-effectiveness and cost-benefit analysis. Definitions of cost concepts relevant for a cost-effectiveness analysis -- National applications of cost-effectiveness and cost-benefit analysis