Summary

The transportation sector is the fourth-largest global contributor of greenhouse gas (GHG) emissions, following Energy, Industry, and Agriculture. In the U.S., Transportation is the largest direct source of GHG emissions, representing 29% of total. This is why decarbonizing transportation must be a priority. Electric vehicles (EVs) are a viable solution to reduce CO2 emissions from passenger cars. But for long-haul transportation – which includes medium and heavy-duty vehicles, aviation, and maritime use cases – EVs have not offered a compelling solution given limitations in range and payload capacity. In searching for alternatives, hydrogen has been highlighted as the fuel of choice for its potential role in supporting a zero-emission, heavy-duty transportation industry. Hydrogen scales very well when there is a high-energy requirement and offers fueling speeds comparable to those of diesel. But challenges related to the sourcing, processing, and storage of hydrogen have limited its mainstream adoption. This is...