It's just absurd to think we can reduce carbon emissions to zero in 11 years. Let's take a look at global carbon output:

https://ourworldindata.org/co2-emissions

    (billions of tons)
    
    1969: 13.69
    1979: 19.46
    1989: 22.19
    1999: 24.43
    2009: 31.46 (Great Recession)
    2019: 36.44

The great recession was notable because that was a global downturn with a significant contraction in economic activity, and CO2 was only reduced from 31.95 to 31.46.

So this number will not be zero in 11 years, or even the same it is now in 11 years. It will be about 5 billion tons higher.