https://www.xprize.org/prizes/carbon :

> The $20M NRG COSIA Carbon XPRIZE develops breakthrough technologies to convert CO₂ emissions into usable products.

CCS: https://en.wikipedia.org/wiki/Carbon_capture_and_storage

CCU: https://en.wikipedia.org/wiki/Carbon_capture_and_utilization

Sequestration: https://en.wikipedia.org/wiki/Carbon_sequestration

Hemp!? Is hemp the best answer? Thousands of products and Oxygen can be made from Carbon diOxide, Hemp, water, UV radiation, and soul.

I wonder how much progress would be made on the millennium prize problems if the prize was increased by 1 or 2 orders of magnitude