União Europeia: redução de 20 a 30% até 2020

20%/30%
As part of a global and comprehensive agreement for the period beyond 2012, the EU reiterates its conditional offer to move to a 30% reduction by 2020 compared to 1990 levels, provided that other developed countries commit themselves to comparable emission reductions and that developing countries contribute adequately according to their responsibilities and respective capabilities.
Appendix I - Quantified economy-wide emissions targets for 2020
http://unfccc.int/home/items/5264.php