Global Warming Emissions from Hydrogen Vehicles

The document finds that hydrogen fuel cell electric vehicles (FCEVs), such as the Hyundai Tucson Fuel Cell SUV, produce significantly lower lifecycle global warming emissions than their gasoline counterparts. While emissions depend on the hydrogen source—with natural gas being the current primary source—the use of renewable hydrogen can reduce emissions by over 50% compared to gasoline. California is highlighted as a leader in this transition through its Zero Emission Vehicle program and SB 1505, which mandates a minimum of 33% renewable hydrogen content at state-supported stations.

• The Hyundai Tucson Fuel Cell SUV produces lower global warming emissions than its gasoline version across different fuel scenarios: it emits 286 g CO2eq/mile when using hydrogen from natural gas (equivalent to a 38-mpg gasoline car) and 202 g CO2eq/mile under California's 33% renewable hydrogen standard (equivalent to a 54-mpg gasoline car).
• Lifecycle 'well-to-wheels' emissions for early FCEVs are reduced by more than 30% compared to conventional gasoline vehicles when using natural gas-derived hydrogen, and by over 50% under California's renewable hydrogen requirements.
• California law SB 1505 requires at least 33% of hydrogen at state-supported stations to come from low-carbon sources, with projections that renewable sources would account for 46% of hydrogen fuel by the end of 2015, potentially reducing the Tucson FCEV's emissions to the equivalent of a 63-mpg gasoline car.
• Hydrogen production emissions vary by source; while most is currently produced from natural gas, lower-carbon alternatives include electrolysis using solar or wind power to split water, or capturing methane from sewage treatment facilities and landfills.

APA

Union of Concerned Scientists (2014). Global Warming Emissions from Hydrogen Vehicles. https://www.ucs.org/sites/default/files/attach/2014/10/How-Clean-Are-Hydrogen-Fuel-Cells-Fact-Sheet.pdf

Chicago

Union of Concerned Scientists. Global Warming Emissions from Hydrogen Vehicles. 2014. https://www.ucs.org/sites/default/files/attach/2014/10/How-Clean-Are-Hydrogen-Fuel-Cells-Fact-Sheet.pdf.

Wikipedia

{{cite report |author=Union of Concerned Scientists |title=Global Warming Emissions from Hydrogen Vehicles |date=September 2014 |url=https://www.ucs.org/sites/default/files/attach/2014/10/How-Clean-Are-Hydrogen-Fuel-Cells-Fact-Sheet.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{unionofconcernedscientists2014global, author = {{Union of Concerned Scientists}}, title = {{Global Warming Emissions from Hydrogen Vehicles}}, institution = {Union of Concerned Scientists}, year = {2014}, month = sep, url = {https://www.ucs.org/sites/default/files/attach/2014/10/How-Clean-Are-Hydrogen-Fuel-Cells-Fact-Sheet.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }