In the year 2000, a group of personalities of aerospace industry, government and research institutes formed the ACARE ("Advisory Committee on Aerospace Research in Europe”) and established the well-known VISION 2020. This vision reflects the targets to reduce the environmental impact of air traffic: reducing both carbon dioxide and noise emissions by half and nitrogen oxide emissions even by 80%. Industry and universitypartners since then jointly defined measures to achieve these challenging goals. Many research programs were implemented funded by national and international bodies, such as the European Union within the Framework program. However, the current status still inhibits further needs to install intense research work.