Part 5/11:
Hydrogen fuel cells generate electricity through a clean chemical reaction, producing only water as a byproduct. This technology has applications ranging from transportation to backup power, offering higher efficiency and lower emissions compared to traditional combustion-based systems.
Branded Constellations in the Night Sky
Russian startup StartRocket has proposed launching small, reflective satellites into low Earth orbit that could be arranged to form branded "constellations" visible in the night sky. This has raised concerns from astronomers about the commercialization and "pollution" of the night sky.