Environmental Regulation: Climate Policy and Emissions Controls

Environmental regulatory approaches differ significantly across major economies, particularly regarding climate change mitigation. The United States relies primarily on executive action and the Clean Air Act's regulatory framework, supplemented by the Inflation Reduction Act's tax incentives, but has oscillated on international climate commitments with changes in administration. No federal carbon pricing mechanism exists.

The European Union has operated the Emissions Trading System (ETS), the world's largest carbon market, since 2005 and has adopted binding targets to reduce emissions 55% below 1990 levels by 2030. The UK established a legally binding net-zero target for 2050 through the Climate Change Act 2008 and launched its own ETS after Brexit. Both use carbon pricing as a central policy tool.

China is the world's largest emitter but has also become the largest investor in renewable energy. It has launched a national ETS covering the power sector and committed to peak emissions by 2030 and carbon neutrality by 2060. Australia has a contested history with carbon pricing, having introduced and then repealed a carbon tax, and now relies primarily on regulatory standards and renewable energy targets.