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Bill

HB 660

Require rules to limit GHG emissions

2025 Regular Session Introduced by Debo Powers

Failed Montana bill would have mandated state agencies establish greenhouse gas emission reduction rules affecting energy, agriculture, and industry operations statewide.

(H) Died in Process
#environmentalprotection #rulemaking
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Bill Summary · HB 660

Legislative bill overview

HB 660 would have required Montana state agencies to develop and implement rules limiting greenhouse gas (GHG) emissions, establishing regulatory standards for emissions reductions across state operations and potentially broader sectors. The bill died in the House Natural Resources Committee in March 2025 after being tabled and missing the deadline for general bill transmittal.

Why is this important

Climate regulation directly affects Montana's energy sector, agriculture, transportation, and industrial operations—all economically significant to the state. Mandatory GHG emission rules would reshape how businesses and government operate, influencing everything from utility rates to compliance costs for regulated entities.

Potential points of contention

  • Economic burden vs. environmental benefit: Opponents likely argued compliance costs would burden Montana businesses and consumers without guaranteed climate outcomes, while supporters contended long-term environmental costs outweigh short-term regulatory expenses
  • Federal vs. state authority: Debate over whether states should independently regulate emissions or defer to federal standards, particularly given Montana's energy-dependent economy
  • Scope ambiguity: The bill's lack of specificity about which emissions, which sectors, and what reduction targets would be determined by agencies—creating uncertainty about actual implementation burden

Compiled from official sources — confirm details with the bill’s official record.

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