A Swiss company has developed a reusable drone that can rise to the stratosphere and offers an environmentally friendly alternative to traditional weather observation balloons, which often become trash. #ilmaennustus #keskkonnatehnoloogia #droonid (translated)
pmo.ee
Hüvasti ilmavaatluspallid: see Šveitsis tehtud droon kihutab stratsofääri viie minutiga
