I am wondering if CO2 can be removed from the atmosphere by heating it up using the same lasers they use to make plasma when researching nuclear fusion, and then fire the plasma of oxygen and carbon through a magnetic field to separate the atoms before they recombine together.
Thanks for all of the answers. So for CO2, plants are the most efficient way of doing this. I have a supplemental question. Why can't plasma lasers + magnetic separation be used to get rid of stuff that is currently buried in landfill or incinerated? For example, asbestos and biotech waste. Build a site in northern Africa with a vast array of solar panels, and use the energy to reduce this stuff to its elements.
Here is a link to another question about plasma recycling: