Plug Power (PLUG -5.80%) believes in a hydrogen-powered future. It's taking a leading role in building the global hydrogen economy with its fully integrated ecosystem. It provides a variety of hydrogen-related products, including electrolyzers, that help companies produce this lower-carbon energy source. The company recently won another deal to help expand the global hydrogen economy. Here's a look at whether it makes this top hydrogen stock a buy. Expanding the hydrogen economy in UzbekistanPlug Power rec ...