You Know Cannabis and hemp create more oxygen than forests… old Hemp and Cannabis advocacy states 1 acre of Hemp produces as much as 25 acres of forest. As Research & Technology advances & Since it’s only a 100 day Crop ( Can reach 12 Feet) they are saying it’s like 25% more oxygen.. Me Personally I Don’t think this research is accounting for Staggered Year Round Growing . Greenhouses, Grow Lights, & Hydroponics… Photo from AI