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As health care organizations develop climate strategies and set greenhouse gas reduction goals, they are increasingly looking to measure the impacts of waste reduction strategies and its role in achieving greenhouse gas reduction targets. The EPA’s WARM Tool calculates and totals Greenhouse Gas emissions of baseline and alternative waste management practices—source reduction, recycling, anaerobic digestion, combustion, composting and landfilling. Further, a related EPA tool translates greenhouse gas reduction into readily understandable impacts, like number of cars removed from the road.

Join the EPA as they explain how you can use the WARM tool to measure material and waste diversion efforts on greenhouse gas reduction and communication to key stakeholders.

Learning Objectives

  1. Learn how waste contributes to greenhouse gas generation and its role in climate mitigation strategies.
  2. Understand how to access and use the EPA WARM Tool for greenhouse gas tracking as it relates to material and waste management strategies.
  3. Learn how the VA uses the WARM tool for tracking waste minimization and greenhouse gas reduction efforts.


Tyler Rubright, US EPA Office of Resource Conservation and Recovery

Tyler Rubright is a biologist in the US EPA’s Office of Resource Conservation and Recovery. His primary role focuses on using data measurement and analytics surrounding Municipal Solid Waste to inform program direction and provide stakeholder information. These efforts seek to expand the analysis of material flows in order to increase recovery of valuable resources from the waste stream and prevent various forms of further pollution. Prior to joining the EPA, Tyler was an Albert Schweitzer Fellow researching the health effects of proximate unconventional natural gas drilling in southwestern Pennsylvania. This fellowship complimented data-intensive research examining ambient air quality effects on heart attack risk. Tyler earned his Bachelor of Science in biology from Furman University, Master of Science degree in environmental and occupational health from the University of Pittsburgh, and a Certificate of Public Health.


Nathan Wittstruck, US EPA Office of Resource Conservation and Recovery

Nathan Wittstruck is an economist with the US EPA Office of Resource Conservation and Recovery. Before transitioning to the waste office’s measurement branch, he promoted sustainable materials management, worked on e-waste issues and helped develop voluntary consensus standards. Nathan also spent one year in the international branch supporting work on key environmental issues in the US-Mexico border region and with the North American Commission for Environmental Cooperation. Currently, Nathan’s primary role is the management of the WARM tool, which includes stakeholder engagement and overseeing technical improvements to the tool. Before joining the EPA, Nathan gained international experience as a Peace Corps volunteer in Panama and as a Rotary Ambassadorial Scholar in Bogota, Colombia. Nathan has a master’s degree in economics from the University of California, Riverside.

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