It is generally assumed that in order to keep global warming below 2 degrees, worldwide emissions have to peak before 2020 and have to be at least halved before mid-century, but the Copenhagen accord doesn’t outline global emissions scenarios nor individual countries’ pathways towards either of these two goals.
Ito ay karaniwang ipinapalagay na upang panatilihin ang global warming sa ibaba 2 degrees, sa buong mundo emissions kung rurok bago 2020 at kailangang hindi bababa sa halved bago kalagitnaan ng siglo, ngunit ang Copenhagen kasunduan ay hindi outline global emissions pangyayari o pathways indibidwal na mga bansa ' patungo sa alinman sa dalawang mga layunin.