I've always wondered if humans could create synthetic photosynthesis factories. Skip all the biological steps of creating cell walls and an immune system and ju

I've always wondered if humans could create synthetic photosynthesis factories. Skip all the biological steps of creating cell walls and an immune system and just create sugars from light and CO2. I would imagine this technology would be especially valuable for space exploration. The whole plot of The Martian would disappear if Mark Watney had a carbohydrate machine.