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Dport · #11 (**permalink**) 03-06-2008, 06:54 PM

"Global warming" is caused in part by higher co2 ammounts in the air...co2 is at its highest natural levels in recorded history. It's the last thing you need to worry about when growing outdoors.

#11 (permalink) 03-06-2008, 06:54 PM
Dport Registered User Join Date: Apr 2007 Posts: 127	"Global warming" is caused in part by higher co2 ammounts in the air...co2 is at its highest natural levels in recorded history. It's the last thing you need to worry about when growing outdoors.