 In order to limit the anthropogenic emissions such that there is no more than a 2 °C change relative to the periods between 1861-1880, carbon emissions would need to be limited to about 1000 GtC by 2100 since that period.However, by the end of 2011 about of half of the budget was already released (445 GtC) indicating that a lower budget is necessary.A distinctive path that aims for a 2.0 °C limit might have complications.