A Finnish technology company, Kelluu, uses an old idea to change modern surveillance. Located in Joensuu, Kelluu has created a small, hydrogen-powered, self-flying airship. This airship is designed for long-lasting use, is environmentally friendly, and has advanced sensors. It is now gaining interest from defense organizations, including NATO. The airship, about the size of a car at roughly 12 meters (40 feet) long, departs from the image of traditional blimps. Powered by hydrogen that provides both lift and fuel, the craft can remain aloft for more than 12 hours per mission, far outlasting conventional drones or helicopters. Company officials say emissions are reduced by 99.5 percent compared with standard aerial platforms, making it one of the cleanest persistent surveillance solutions available. Company officials say emissions are reduced by 99.5 percent compared with standard aerial platforms, making it one of the cleanest persistent surveillance solutions available.

Full report : Kelluu, a military tech startup launches a hydrogen powered airship, about the size of a car at roughly 12 meters (40 feet) to spying missions.