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RAEL’S COMMENT: Yes, if we like plants, trees and forests we need to produce more CO2. That machine is sold to greenhouse owners so the plants grow faster…
 

Carbon dioxide is one of the essential ingredients in green plant growth, and is a primary environmental factor in greenhouses. CO2 enrichment at 2, 3 or 4 times natural concentration will cause plants to grow faster and improve plant quality.

https://www.johnsongas.com/industrial/CO2Gen.asp?fbclid=IwAR0IdyRaTSL3PUdIka-pTjzP5K3Art-wAmWDDu-OnR-DEsID0ENKb_EAE7s