molecular hydrogen
Molecular hydrogen (Hâ‚‚) is a simple, abundant molecule composed of two hydrogen atoms bonded together. It is a colorless, odorless gas that exists naturally in the universe, including in space and within our planet's atmosphere. Hydrogen molecules are highly reactive and can serve as a clean energy source because they produce only water when burned, making them environmentally friendly. Researchers also explore hydrogen's potential in fuel cells and industrial processes. Despite its simplicity, molecular hydrogen plays a vital role both in natural systems and emerging technologies focused on sustainable energy.