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

Encyclopedia: ETS

• prosthetic device
• prosthetics
• prosthetist
• prosthion
• prosthodontia
• prosthodontic
• prosthodontics
• prosthodontist
• Prostigmin
• prostitute
• prostitution
• prostitutor
• prostrate
• prostration
• prostyle
• prosumer
• prosy
• protactinium
• protagonism
• protagonist
• protamine
• protanopia
• protanopic
• protasis
• protea