Hydrogen is quickly becoming an essential part of the green energy matrix. For this reason, I recommend that investors consider the best hydrogen stocks to buy.The hydrogen market is expected to expand in the future, with estimates placing it at $410 billion by 2030. This growth is due to increased innovation and significant spending on hydrogen infrastructure globally, especially from entities such as the U.S. Department of Energy, which has spent $1 billion on hydrogen production projects​.Hydrogen has hu ...