Postponing emission reductions from 2020 to 2030 increases climate risks and long-term costs

摘要: Substantially postponing the emission reductions, compared to ranges indicated in IPCC’s recent assessment for 2020 as required meeting longterm 2°C target, increases risk of exceeding this target. The costs a delay strategy are lower short term, but leads higher longer term. analysis shows if reductions postponed 2030 it is not likely that emissions from earlier years can be fully compensated future decades so-called ‘delayed action scenario’. A full compensation would require reduction rates coming much than those found scenario literature. Without compensation, global temperature rise target will increase. This confirms only commitments 2050 determine also path between now and 2050. To meet more ambitious targets needed developed developing countries have been pledged so far.