Department of Defense

The US Department of Defense reported total emissions of approximately 54.77 billion kg CO2e in 2019. In 2018, total emissions were about 55.41 billion kg CO2e, and in 2017, they were approximately 58.39 billion kg CO2e. The department has not disclosed emissions data for Scope 1, Scope 2, or Scope 3 separately for these years.

The Department of Defense has set several climate commitments. It aims for the Army Reserve to achieve 100% zero-emission vehicle (ZEV) acquisitions for both Scope 1 and Scope 2 emissions by fiscal year 2027, starting from 2023. Additionally, the department is committed to achieving net-zero emissions across its portfolio of buildings, campuses, and installations for all scopes by 2045, with efforts commencing in 2023. The Department also seeks to reduce traffic congestion and air emissions (Scope 1) by 85% by 2025, from a 2020 baseline, and reduce stationary source air emissions (Scope 2) by 85% by 2025, also from a 2020 baseline. Between 2003 and 2021, the Department achieved an energy intensity reduction of 20.9% for both Scope 1 and Scope 2 emissions, attributed to various project implementations. The department plans to continue its strategy of transitioning gas-dedicated vehicles to lower greenhouse gas (LGHG), alternative fuel, and electric vehicles for Scope 1 and Scope 2 emissions by 2050.