United States (US) space agency NASA has said that using fuels made from plants may help aircraft reduce the amount of emissions that their engines give off.
When plane engines burn fuel for energy to fly, they give off tiny particles that mix with the cold air at great heights to form thin streams of clouds called contrails. Researchers believe that contrails have a role in increasing temperatures on Earth.
NASA tested fuel made from the oil of the camelina plant. Its test planes flew using a mix of regular fuel and the plant fuel. Results show that emissions from the engines were not as polluting as before. NASA will continue these studies which may show us ways in which we can make air travel a lot less polluting.