This bill requires the Environmental Protection Agency to update the scientific models it uses to measure greenhouse gas emissions from different fuel sources under the Renewable Fuel Standard program. Specifically, the EPA must adopt the GREET model developed by Argonne National Laboratory within 90 days of the bill becoming law, and then update its methodology every five years afterward to ensure it reflects the latest available data and technology. The bill applies to fuel pathways that have been approved by the EPA and assigned special codes indicating their environmental status. If the EPA fails to meet the 90-day deadline or subsequent five-year deadlines, it must report to Congress explaining why. The legislation was introduced by a bipartisan group of senators and aims to modernize how the government evaluates the environmental impact of renewable fuels and biofuels.
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