I… don’t think so… Unless you define efficiency differently.
Disclaimer: botanist here. If we could properly harness photosynthesis, our energy problems would be a thing of the last. I had a microbiology lecturer who was working on Rhodospirillum, and some extremophiles among others, to produce H2. He gave up and said times aren’t right for this. Nobody was interested at the time. He wanted to scale up bioreactors, but noone wanted to finance this. That was quite a while ago, and he’s long gone now.
