U.S. climate policy is a patchwork:
- Inflation Reduction Act (2022): Major federal investment in clean energy via tax credits and subsidies; the largest climate legislation in U.S. history.
- EPA regulations: Power-plant CO2 standards, vehicle emissions standards.
- State-level: California's ZEV mandate, RGGI (10-state cap-and-trade for power), state RPSs.
- International commitments: Paris Agreement (re-joined in 2021).
The U.S. has reduced emissions ~17% from 2005 levels. Reaching the 2030 target (50-52% reduction) requires sustained policy and significantly more deployment.
Approaches debated: carbon pricing, technology-neutral subsidies, regulatory mandates, permitting reform to enable buildout, R&D investment.