Some just don’t have a sense of proportion. The implication is that somehow making computer chips out of CO2 will resolve, to any meaningful degree, the “global warming” problem - when the ratio of such useful use to problematic production is orders of magnitude of orders of magnitude. This isn’t “save the planet” material, it’s “Total Perspective Vortex” material.
I’m not a EE so don’t try to pin me on this. But, from what I’ve read silicon based semiconductor technology is fast approaching it’s outer limit of performance capability. In other words, Moore’s Law my soon no longer be valid without a breakthrough. So, the industry is desperately searching for a new medium to replace silicon and take it to the next level. So far, it seems, no luck.