Ok, so we have a long-term goal of keeping global warming below 2°C/1.5°C, but what does this mean in reality? Enter the IPCC AR5 cumulative emissions budgets! This is the maximum amount of tons of CO2 the atmosphere can take before crossing these limits. According to the AR5, after 2010 we can only emit an additional 1,000 billion tons (Gt) of CO2 into our atmosphere if we want a higher than 66% likelihood of limiting global warming to below 2°C. To keep warming below 1.5°C the remaining carbon budget is consequently smaller. Since 2010 we have already spent about a … Continue reading IPCC science points to zero carbon by 2050