What do you think would happen to the food chain and life in general if photosynthesis shut down for some reason? Would life continue as normal? Could humans continue as normal? Would our technology be able to save us?
If photosynthesis shut down, firstly carbon dioxide levels would keep on increasing as plants consume co2 and give out oxygen by which humans survive.
Co2 would increase and oxygen would decrease. And we wouldn't be able to breath eventually.
Technology wouldn't be able to completely save us because they wouldn't be able to provide oxygen to billions of people here effectively.
Hope it helped! :)
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