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uga hort nerd
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Post by uga hort nerd » Wed Nov 23, 2005 3:56 am

Cacti don't release CO2 _at_ night. They use crassulacean acid metabolism (forgive my spelling). They, along with other succulents and bromeliads etc. open their stomata at night to reduce water loss and take in CO2 at night. They release O2 _at_ night which is a good thing.

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