26th February 2024
To keep the world within the desired 1.5C of warming, the carbon dioxide concentration in the atmosphere has to be kept below 500ppm. To achieve this the ambition agreed at COPxx in Paris in 2015 is to reduce global carbon emissions by 45% by 2030 and to net zero by 2050.
In 2015 global carbon dioxide emissions were just over 35 billion tonnes, in 2019 emissions reached 37 billion tonnes, and having dropped back to 35 billion tonnes in 2020 during covid, emissions are again back up at 37 billion tonnes (2022).
Each year that passes without meeting these targets means that to achieve the 2030 and 2050 targets becomes even more difficult as we have to cut back emissions even more steeply. This is vividly shown in the graph below.
The Green Tau 