Algae with nitrogen fixing organelle (nitroplast) can be such "plant", because it will need air, water, and micronutrients to fixate CO₂ and NO₂, so it can be u

Algae with nitrogen fixing organelle (nitroplast) can be such "plant", because it will need air, water, and micronutrients to fixate CO₂ and NO₂, so it can be used as fertilizer, which will offset cost of CO₂ fixing. See https://www.nature.com/articles/s41598-021-90204-8 https://www.nature.com/articles/s41598-021-90204-8