While this is significant, further reductions from industrialised countries and the more advanced developing countries would be required to achieve the reductions judged by the IPCC to be necessary by 2050 to have a 50% probability of limiting warming to 2°C (this scenario entails stabilising the atmospheric concentration of long-lived GHG at 450 ppm CCb-equivalent). To reach a final agreement, it will be necessary to agree a fair distribution of abatement burdens. In the context of the above noted commitment of developed countries to provide financial assistance to developing countries to help them with abatement and adaptation measures, the US government announced that it would contribute its share to developed country financing of almost USD 30 billion over 2010-12 (US Department of State, 2010 for this sentence and the rest of the paragraph), which would entail a substantial increase in US climate assistance. In keeping with this commitment, the FY 2010 budget provides for more than a three-fold increase in bilateral and multilateral funding for climate-related activities from the enacted funding in the previous year.