October 09, 2023 | Press Release
  • Headline: Documenting the Worst U.S. Climate, Air, and Water Polluting Corporations
  • Type of publication: Press Release
  • Research or In The Media: Research
  • Research Area: Environmental and Energy Economics
  • Publication Date: 2023-10-09
  • Authors:
    • Add Authors: Michael Ash
    • Add Authors: James K. Boyce
    • Add Authors: Rich Puchalsky
  • Show in Front Page Modules: Yes

>> View Greenhouse 100 Suppliers Index
>> View Greenhouse 100 Suppliers State List
>> View Greenhouse 100 Coal Index
>> Read Technical Paper

>> Download press release

PERI researchers Michael Ash and James Boyce along with Rich Puchalsky released the second annual edition of the Greenhouse Suppliers 100 Index, a comprehensive ranking of corporations that contribute to U.S. greenhouse gas emissions by supplying fossil fuels. For the first time, PERI also has released the companion Greenhouse 100 Suppliers State List, presenting state-level rankings for the quantity of greenhouse gas emissions from fossil fuels supplied within their borders. The Greenhouse 100 Suppliers Index is the first comprehensive database to cover emissions from all three fossil fuels: oil, natural gas, and coal. 

Four oil companies top the national index: Marathon Petroleum, Phillips 66, Valero Energy, and ExxonMobil account collectively for one-quarter of the total greenhouse gas emissions from fossil fuel combustion in the U.S. economy. Rounding out the top 10 are two coal companies, Peabody Energy (No. 5) and Arch Resources (No. 7), three additional oil companies, Chevron (No. 6), PBF Energy (No. 9), and PDVSA (No. 10), and a natural gas firm, Enterprise Products Partners (No. 8). The top 10 fossil fuel suppliers alone account for over 40% of greenhouse gas emissions from fossil fuel in the U.S.
Texas, Wyoming, Louisiana, California, and Illinois top the Greenhouse 100 Suppliers State List for the quantity of greenhouse gas emissions from fossil fuels introduced within their borders.

The Index comes with an open-access database that provides information on all fossil fuel suppliers in the country and by state, both at the level of individual facilities and at the level of parent corporations that own them, as well as a comprehensive search tool for every fossil fuel corporation.

The rankings are based on 2021 data from the Environmental Protection Agency’s Greenhouse Gas Reporting Project (GHGRP) on oil and natural gas suppliers, together with data on coal suppliers from the U.S. Energy Information Administration and the Mine Safety and Health Administration, using methods described in a peer-reviewed journal article

This new list joins the Greenhouse 100 Polluters Index, which ranks U.S. companies by their emissions responsible for global climate change according to the EPA Greenhouse Gas Reporting Program, and the Toxic 100 Air and Toxic 100 Water Indexes, which rank U.S. industrial polluters using the EPA Toxics Release Inventory. 

The complete Toxic 100 and Greenhouse 100 Indexes and full press release can be found online at http://toxic100.org/.


umass logo

This is an official web page
of the University of Massachusetts.

Political Economy Research Institute

Gordon Hall, 418 N. Pleasant St., Suite A

Amherst, MA 01002
Tel: 413-545-6355 Fax: 413-577-0261