Here's the bottom line:
The world emits 40 billion tons of CO2 every year.
We know how warm the planet will get for a certain CO2 level. We call this our CARBON BUDGET.
We have 4 more years to go to carbon zero to keep below 1.5°C.
We have 20 more years to go to carbon zero to keep below 2.0°C.
Problem: no one wants to cut their carbon emissions.
Fake solution: why don't we use some schemes for NEGATIVE EMISSIONS (= WAYS TO PULL CO2 FROM THE ATMOSPHERE)
These fake solutions make us relax and keep on with business as usual. Read the document below for a better understanding.