The article discusses the author's journey in the cleantech industry, particularly focusing on hydrogen as a zero-emission solution in various markets like transportation and power generation. Initially, the author had immense enthusiasm for hydrogen, believing it to be a significant step forward. However, with increasing knowledge, it became apparent that several technical hurdles need to be resolved for hydrogen to become widely adopted. The piece emphasizes that the industry is actively addressing these challenges, including aspects like production, storage, and distribution. Despite the remaining work, the article highlights that there are frequent advancements in the field, with new stories on hydrogen innovations emerging regularly. Specifically, the article mentions three transportation-related milestones in the hydrogen sector. Overall, the sentiment towards hydrogen in the article is positive, portraying it as a promising solution while acknowledging the necessary advancements and ongoing industry efforts.