> not just “turn deserts into plant areas” or “encourage algae blooms” or something? That might be slightly more tricky (and less efficient) than you seem to i

> not just “turn deserts into plant areas” or “encourage algae blooms” or something? That might be slightly more tricky (and less efficient) than you seem to imagine. Also, the prize is not exclusively for "chemical" carbon extraction, if you can find a way to scale algae bloom to be a long term carbon sink without ruining the environment in other ways you are eligible: > Any carbon negative solution is eligible: nature-based, direct air capture, oceans, mineralization, or anything else that achieves net negative emissions, sequesters CO2 durably, and show a sustainable path to achieving low cost at gigatonne scale.