Abstract: | Since the beginning of the 1980s a number of studies on the energy and environmental efficiency of alternative fuels was carried out. Most of the studies caused hot discussions among proponents and opponents on an expert level but also in the public. Atmospheric and environmental deterioration due to large consumption of fossil fuels has become an environmental problem taken up on a global scale. Resolving this problem, together with global warming by CO2, has become one of the foremost issues in modern society. Ăn recent years, in particular, attention has focused on diesel vehicle emissions as a major cause of atmospheric deterioration. Policies are being advanced to reduce the burden on the atmosphere and the environment both in terms of fuel and in terms of fuel-burning equipment. |