Data as of Jul 25, 2026 · Based on 2,718,867 AI responses across 9,511 prompts · See how Parse measures this
The National Emissions Inventory (NEI) is a comprehensive estimate of air emissions for criteria pollutants, precursors, and hazardous air pollutants from all source types. It is released every three years and is built from data provided by state, local, and tribal air agencies, supplemented by the U.S. EPA.
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