Abbe Ramanan
Green hydrogen and green ammonia are touted as potential replacements for fossil fuels, but their actual environmental benefits are questionable. This fact sheet looks at the risks of hydrogen combustion.
This fact sheet evaluates the viability of hydrogen as a long duration energy storage (LDES) technology. It examines the costs, efficiency, infrastructure considerations, and potential harms of hydrogen power plants.
This CEG report contains new analysis evaluating the feasibility of hydrogen power plants as long-duration energy storage resources, based on cost competitiveness as well as equity and environmental impacts.
In these comments, CEG urges DOE to extend the deadline for comments on the proposed scope of the Environmental Impact Statement for the Appalachian Hydrogen Hub by another 60 days and lays out the ramifications of hydrogen energy.
In these comments, CEG urges DOE to extend the deadline for comments on the proposed scope of the Environmental Impact Statement for the California Hydrogen Hub by another 60 days and lays out the ramifications of hydrogen energy.
The Greenhouse gases, Regulated Emissions, and Energy use in Technologies (GREET) model is used to determine the lifecycle emissions of various energy sources, expressed as carbon equivalent emissions, and creates the framework for many monetary and market incentives related to energy production. In some cases, the values, assumptions, and calculations within each GREET model have…
In these comments submitted to the U.S. Department of Energy (DOE) Office of Clean Energy Demonstration, CEG urges DOE to extend the deadline for comments on the proposed scope of the Environmental Impact Statement for the Pacific Northwest Hydrogen Hub by another 60 days. This is due to limited information on the scope and locations…
The U.S. Treasury Department released final guidance on the 45V Clean Hydrogen Production Tax Credit in January 2025. While the guidance did contain the vital “three pillars” of incrementality, temporal matching, and deliverability, which are essential for ensuring hydrogen production does not lead to a massive increase in grid emissions, it also contains several concessions…
Clean Energy Group submitted comments to the New Jersey Department of Environmental Protection regarding the Draft Air Pollution Control Operating Permit Significant Modification, issued to the Passaic Valley Sewage Commission (PVSC). CEG points out that PVSC has not provided sufficient evidence that their proposed combustion turbines are necessary to meet the anticipated maximum energy demand…
Comments on the Repeal of Greenhouse Gas Emissions Standards for Fossil Fuel-Fired Electric Generating Units
Clean Energy Group (CEG) submitted these comments to U.S. Environmental Protection Agency (EPA) administrator Lee Zeldin in regards to Docket ID No. EPA-HQ-OAR-2025-0124.