According to the recent news a new reaction engine was invented whose designers intend to solve given problem at least partially. This engine is a hydrogen-powered A2 aircraft concept that would be capable of hitting Mach-5 – five times the speed of sound (3400 mph), making it somewhat the spiritual successor of the Concorde. What makes it different is range and efficiency, capable of ferrying up to 300 passengers from Brussels to Sydney in less than four hours. It uses a 2-mode engine that makes it efficient at low speeds as well as hitting top gear with relative ease.