According to Barron's, shares tanked in the wake of PLUG's latest quarterly earnings report. This happened because the company revealed it has fallen behind on its plans to launch green hydrogen plants. But, the firm continues to make progress on that front as its Georgia factory is close to being fully operational. Additionally, it has four other plants either under construction or completed. And, the Street is also concerned about the company's margins, but PLUG recently reported that by the end of this year its ability to produce its own green hydrogen.