A decrease of up to two thirds of the 2010 emissions by 2030 is cost-effective because proven and tested alternatives are available in many sectors.
Tá laghdú suas le dhá thrian d’astaíochtaí 2010 faoi 2030 costéifeachtach mar tá malairtí atá cruthaithe agus tástáilte le fáil i go leor earnálacha.