Technological Innovation: Developing a system where airplanes can extract water from the sea while in flight would require significant advancements in technology. It would involve mechanisms for safely collecting, filtering, and storing water, all while ensuring the aircraft’s stability and safety.

Environmental Impact: Such a system could have both positive and negative environmental impacts. On the positive side, it could reduce the need to carry large amounts of water on board, potentially saving fuel and reducing emissions. On the negative side, the process of extracting water from the sea could disturb marine ecosystems if not carefully managed.

Practical Applications: If feasible, this concept could have several practical applications. For instance, it could be used in firefighting, where planes need to collect large quantities of water quickly. It could also be useful in long-haul flights or in areas where water resources are scarce.