In short: it does not matter where we capture CO2.
The CO2 level in the atmosphere is homogenous across the world (0.04%), since the diffusion and mixing of carbon dioxide in the atmosphere happens very fast.
Climeworks’ direct air capture plants can thus be built nearly anywhere and run efficiently as they are optimized to work with a concentration of 0.04% or less CO2 in the air. However, local climate and weather conditions, as well as altitude have a certain effect on the performance characteristics.
There is another technological approach called Carbon Capture and Storage (CCS), which captures CO2 at the point source. It is an approach for emissions reductions: it typically prevents new fossil CO2 emissions from entering the atmosphere. DAC+S goes beyond reducing emissions because it allows to remove residual and historic CO2 emissions that are already in the atmosphere, which produces negative emissions.
Read more about the topic:
- Can you build a plant anywhere in the world?
- What is the difference between Direct Air Capture & Storage vs Carbon Capture and Storage? (DAC+S vs CCS)