This fact sheet provides a snapshot of the 2021 market for zero-emission heavy-duty vehicles in the U.S. and Canada. It highlights a decline in overall sales compared to 2020, with buses making up the majority of zero-emission registrations. Despite the downturn, sales of zero-emission heavy trucks increased, indicating growing interest in electrification. The document also compares regional trends and discusses the impact of supply chain disruptions on vehicle registrations.