U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 40Chapter IPart 97Subpart A - Subpart A—NOX Budget Trading Program General Provisions
View all text of Subpart A [§ 97.1 - § 97.7]
§ 97.3 - Measurements, abbreviations, and acronyms.

Measurements, abbreviations, and acronyms used in this part are defined as follows:

Btu-British thermal unit. CO2-carbon dioxide. hr-hour. kW-kilowatt electrical. kWh-kilowatt hour. lb-pounds. mmBtu-million Btu. MWe-megawatt electrical. NOX-nitrogen oxides. O2-oxygen. ton-2000 pounds.
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