like duckweed a research project is investigating the welfare of farmed fish. 46000000 flights took off around the world in 2018 and their number continues to climb despite all the concerns about the impact of aviation on climate change. forecasts say europe alone will see air traffic increase by 42 percent in the coming decades . with less fuel and less noise the aircraft of the future needs to be more environmentally friendly. in the tip of the wing the final component of an unusual model airplane but there are new designs he s on hand. and alexander food ice from munich technical university want to make flying quieter and more environmentally friendly.