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

Encyclopedia: ETS

• dare
• daredevil
• daredevilry
• daredeviltry
• daren't
• darer
• Darfur
• Dari
• Dari Persian
• daric
• Daricon
• Darier's disease
• daring
• daringly
• dariole
• Darius I
• Darius III
• Darius Milhaud
• Darius the Great
• Darjeeling
• dark
• dark adaptation
• Dark Ages
• dark bread
• dark chocolate