Saving fuel means saving money, but it also means lower emissions and reduced fuel consumption — both crucial in a world with increased awareness of global warming and other environmental concerns.
Lower Emissions: The combination of continuous descent approaches and shorter tracks built into RNP procedures can reduce emissions by thousands of tons per year per aircraft.
Less Noise: Continuous Descent Approaches (CDAs) use lower, quieter thrust levels. Because of their precision and ability to curve, RNP paths can also be designed to avoid noise-sensitive areas.