Global Budgets

The global targets are based on the IPCC carbon budgets documented in the Assumptions at the bottom of this page. There are no official targets but we have calculated what the targets would be if the limits for remaining around 1.5oC or under 2oC were followed, and using the known emissions for the years 2011 to 2015 and projected emissions from 2016 to 2020. Global targets are specified as Carbon Dioxide (CO2).

The following charts are an example of what global emission reductions need to be along with the cumulative emissions resulting from the suggested limits. These charts assume that emissions are reduced at the same rate each year. This is obviously not realistic and is a best-case scenario. There is a history of global emissions here.

Suggested emission reduction targets
Limits to cumulative global emissions resulting from the suggested emission reduction targets
This chart represents the targets for keeping the total global emissions under the cumulative limits for a likely (66%) chance of keeping global temperatures from rising more than 1.5 (green) and 2 (blue) degrees C.
The horizontal lines represent the limits on cumulative emissions for a likely (66%) chance of keeping global temperatures from rising more than 1.5 (orange) and 2 degrees C (red). The other lines represent the cumulative emissions if we follow the targets for 1.5 (green) and less than 2 degrees C (blue). 

Click on the charts to see them full size
 

The emission reduction targets for remaining around 1.5 or below 2 degrees C are in this table (compared to 2011 emissions).

Year

1.5oC

Less than 2oC

2020
11% above
22,512 MtCO2
11% above
38,900 MtCO2
2030
100% (by 2028)
12%
30,950 MtCO2
2040
 
34%
23,000 MtCO2
2050
 
57%
15,000 MtCO2

 

What happens if we do not reduce our annual emissions?

According to CarbonBrief

[T]here are just over four years’ worth of current emissions left before it becomes unlikely that we’ll meet the 1.5C target without overshooting and relying on unproven “negative emissions” technologies to remove large amounts of CO2 out of the air later in the century."