Used by governments for decades, market-based policies are mechanisms to control environmental pollution at various leverage points. They work by changing relative prices – raising the cost of emissions-intensive activities and/or lowering the cost of lower-emitting alternatives – to provide producers and consumers with a financial incentive to adopt the latter. Policies that can be considered market-based include taxes and fees, subsidies, and the use of pollution control trading systems. Market-based policy instruments provide financial incentive to elicit specific behavior from entities responsible for greenhouse gas (GHG) emissions, whether consumers or producers. This brief provides an overview of market-based policies aimed at reducing GHG emissions in several major emerging economies: Brazil, China, India, South Africa and South Korea. By implementing regulatory and marketbased policy instruments across their economies, these countries are seeking to promote cleaner technologies and behavior change while also promoting economic development and growth.