1. A market-based trading scheme for rights to emit greenhouse gasses that contribute to global warming
   - emission trading scheme

Encyclopedia: ETS

• refractory anaemia
• refractory anemia
• refractory period
• refractory pot
• refractory-lined
• refracture
• refrain
• reframe
• refrangible
• refresh
• refreshed
• refreshen
• refresher
• refresher course
• refreshful
• refreshfully
• refreshing
• refreshingly
• refreshment
• refried beans
• refrigerant
• refrigerate
• refrigerated
• refrigerating
• refrigeration