They are designing an artificial system that mimics how plants and
other photosynthetic organisms use sunlight to convert CO2 and water into molecules that humans can later use for fuel.
Not exact matches
But these
photosynthetic organisms activate
other biochemical pathways at night, when they generate energy by breaking down the sugars, starches, and oils that they created during the day.
Researchers have found the first
photosynthetic organism that lives off a light source
other than the sun.
Re posts 8 & 3: I think only
photosynthetic organisms gain a direct benefit from higher CO2, and fishes are certain not to benefit (although some fish species may be less sensitive to HCO3 than
others and receive an indirect benefit via ecological interactions).