12 April 2021 Calculations of global carbon budgets have underestimated potential increases in global temperatures, and the world will have to dramatically accelerate its decarbonisation efforts, a new analysis of climate projections has argued. According to a new briefing note published by the National Centre for Climate Restoration, also known as Breakthrough, carbon budgets calculated by authorities like the Intergovernmental Panel on Climate Change (IPCC) are virtually meaningless due to a failure to adequately account for feedback effects, and are likely to lock in higher temperature increases. The paper paints a grim picture of the chances to achieve global warming limits enshrined in the Paris Agreement, in which countries agreed to goals of limiting warming to no more than 2°C above pre-industrial levels, and striving to limit to no more than 1.5°C.