This Practice note summarises the key EU legislation to implement the Climate Change and Energy Package (the "20-20-20 package"), namely the Renewable Energy Directive (2009/28/EC), the EU ETS Directive (2009/29/EC), the Fuel Quality Directive (2009/30/EC), the Carbon Capture and Storage Directive (2009/31/EC), Decision No 406/2009/EC on effort sharing and Regulation (EC) No 443/2009 limiting carbon dioxide emissions for new passenger cars.