looking to learn about C02 (help)

[Star]

Hey guys, i am thinking of introducing C02 in to my next grow, however i have absolutely no knowledge of how it works what to do with it and why. Is it dangerous? or pricey? will i see a noticeable gain in yeild and quality? just a few of many questions i have related to C02 in the grow room. If you have any info or experience you would like to share that would be greatly appreciated. Thank you

 

[Star]

i have limited space in this room and need to make sure its safe, any feed back wold be helpful, thanks