[tzs]

Note that is how much is needed to produce an amount of energy equal to the current consumption of the entire world. It is to illustrate how abundant solar energy is.

That would be enough energy with current DAC technology to remove each year about 50% of the year's CO2 emissions. That would effectively knock us back to 1970 levels of net yearly emissions.

There are 5 subtropical deserts in the world with areas greater than 500 000 km^2. There's room in those 5 deserts for about 30 of those 500 000 km^2 solar farms. That's enough energy to in 1 year bring atmospheric CO2 down to around 320 PPM, which is around 1960 levels. 2 years to get back back to 1800 levels. 6 years to get to pre-industrial levels.

Of course it is possible that at that scale energy isn't the bottleneck for DAC. It may depend on other resources that cannot scale that well.