Sustainable development does not mean stopping development. The SDGs emphasise how a new perspective is required for future development. There is no evidence to suggest an open-sky agreement would increase environmental degradation, nor is there to say that if an open-sky agreement is not implemented we will develop in a more sustainable way. The introduction of open-skies will mean an introduction of better planes – more fuel-efficient and eco-friendly designs as a result of competition on quality and safety. Advancements have been made over time to improve the environmental performance of aeroplanes. Today’s planes are 75% quieter, with carbon-monoxide levels declining by 50%, and increasingly more fuel-efficient [1] . An open-skies agreement enables new ideas and designs to be integrated, encouraging the implementation of sustainable models.  Sustainable development is about how we understand, appreciate, and implement future objectives. An open sky agreement is not necessarily unsustainable.  [1] See further readings: IATA, 2014.