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

Encyclopedia: ETS

• upsurge
• upsweep
• upswept
• upswing
• upsy-daisy
• uptake
• upthrow
• upthrust
• uptick
• uptight
• uptil
• uptime
• Upton Beall Sinclair
• Upton Sinclair
• uptown
• uptrend
• upturn
• upturned
• Upupa
• Upupa epops
• Upupidae
• upward
• upwardly
• upwardly mobile
• upwards