Gas Emissions

Reducing our greenhouse gas emissions is key to becoming a sustainable, carbon-free steel producer.

At U. S. Steel, we have started our journey down the carbon curve and toward sustainable, carbon-free steel production by committing to our Best of BothSM strategy. Our vision of combining the Best of BothSM mini-mill and integrated steelmaking technologies under one brand also allowed us in 2019 to establish a global greenhouse gas (GHG) reduction goal.

Specifically, U. S. Steel has set a goal to reduce its global GHG emissions intensity by 20%, as measured by the rate of carbon dioxide equivalents (CO2e) emitted per ton of raw steel production, by 2030 based on 2018 baseline levels. Read more about our goal in our 2019 Sustainability Report.

We intend to achieve our goal by:

  • Adding mini-mill steelmaking technology to our operational footprint;
  • Completing energy efficiency initiatives; and
  • Initiating continuous improvement projects at our integrated steelmaking facilities.

In addition to our efforts to reduce the carbon footprint from our own production processes, we employ teams of marketing, research and engineering talent that interact with our customers, government institutions, academia and trade organizations to find ways to reduce the environmental impact from the manufacturing and use of products produced with steel. These interactions have played a significant role in the development, production and use of advanced high-strength steels (AHSS) and ultra-high-strength steels (UHSS), thus helping society move down the carbon curve.

For example, a primary use of AHSS and UHSS is in the lightweighting of automobiles, which in addition to improving crash safety, allows automobile manufacturers to meet fuel efficiency targets through lowering the overall weight of a vehicle.

GreenHouse Gas Emissions
2030 Goal


We have set a goal to reduce our GHG emissions intensity by 20% by 2030 based on 2018 baseline levels.

Spotlight: GHG Emissions Reduction Projects



Our Edgar Thomson Plant completed refurbishment and replacement of power generation equipment that increased the facility’s electricity generation by approximately 170,000 kilowatt hours (kWh) in 2019. This enables the plant to recycle more of the gases it generates during the steelmaking process, which reduces flaring and greenhouse gas emissions.



U. S. Steel Košice completed the installation of a computer model that ranks the blast furnace charge materials in order of emission potential. This allows operations to be adjusted to reduce the amount of carbon dioxide emitted. This ranking program has reduced annual greenhouse gas emissions by up to 69,000 tonnes annually.

Environmental Areas of Focus

U. S. Steel’s current environmental areas of focus align with the results of our ESG Materiality Assessment.