[en] The report is the final report from a jointly financed project within lVL studying methodology for environmental impact assessments (EIAs). The aim has been to show possibilities and problems with EIAs for air pollution emissions from energy production plants in environments where critical loads and levels are exceeded. The project has mainly dealt with plants emitting air pollutants with environmental effects on the regional scale, including sulphur and nitrogen compounds, volatile organic compounds and particles, and effects such as acidification, eutrophication and ozone formation. Conclusions from the work are that project managers, environmental auditors, together with regional and local authorities could have use for better and more detailed guidelines, in the form of more detailed emission data from different types of alternative plants; Guidelines for the elaborating and assessing of relevant zero alternatives; Regional environmental goals and guidelines for the acceptable contribution to these by different activities; Criteria for the definition of the areas of 'environmental influence'. Furthermore, quantitative relationships between exposure and effects may contribute to better and more detailed descriptions of environmental impact and the need of decreasing the load for the recovery of polluted ecosystems