On Sat, 26 Jan 2019 09:51:26 +0000, Andy Burns wrote:

I thought they had two mechanisms ... one absorbing O2 and emitting CO2
all day long, and another absorbing CO2 and emitting O2 only while
photosynthesising?

I only heard a brief part of this "expert" pontificating and it seems no
one else here heard the item, so I'm none the wiser, I'm afraid.




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Leave first - THEN negotiate!