Making engines that are more efficient, will burn less fuel and in theory will help to reduce the rate of global warming.
However, if I’m honest, the main reason that companies want to reduce fuel is not to improve the environment. It’s to reduce the cost of flying because kerosene (aeroplane fuel) is the most expensive thing in an aeroplane company like Easyjet. So, making more efficient engines is commercially driven, but in the long run will be better for the environment than the current engines 🙂
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