Current emissions reduction pledges, therefore, still guarantee disaster.
The UN Environment Program said that even if nations meet their current emissions reduction pledges, carbon emissions in 2020 will be eight to 12 gigatonnes above the level required to avoid a costly nosedive in greenhouse gas output.
The White House anticipates the talks will help meet an internationally agreed target of keeping global warming below a 2C compared with pre-industrial times, even though current emissions reduction pledges amount to warming of around 2.7C.
It is a stunning shift from Copenhagen that 190 nations covering 90% of current carbon emissions have now submitted their national emission reduction pledges - some shockingly ambitious, some limp and lame, a few perhaps bogus - but the expectation of climate action is now global, not just confined to the US, the EU and Japan.
Current emission reduction rates are not large enough.
We suggest re-negotiating emission reduction pledges based on a global carbon budget approach [3] in order to achieve coherence between politics and science.
These include forestry, a new Green Fund to assist developing nations, and the anchoring of the emission reduction pledges made last year in Copenhagen.
Reducing carbon emissions from the transport sector is essential to meet the Paris Agreement emission reduction pledges made in 2015, and is a key subject of debate at the two-week U.N. climate conference currently meeting in Poland.
The report plays it safe, using the Australian government's current emission reduction targets as its basis.
Furthermore, the often perceived economic disadvantages from ambitious emission reduction pledges mostly rely on static and short-sighted economic considerations.
We suggest re-negotiating emission reduction pledges based on a global carbon budget approach [ 3] in order to achieve coherence between politics and science.
