What's the best way to make a co2 system?

I've been hearing a lot of people talking about co2 and the results that they get with them, so is there anybody who knows how to make a cheap co2 system? And if so explain to me how to make it!

hey k, do a little research on your own on that, you are lazy man we got a search function in the forum, learn to use it

a) buy soda water, mist or spray on plant leaves. (mixer, tonic water. Make sure it's carbonated water ONLY, no salt etc)
b) drip vinegar into baking soda.

there is another one with water, sugar and yeast but you will have to look for that one. These are the cheapest solutions.

Other solutions might be to put a regulator on a paintball co2 bottle (or on a larger co2 canister that you can purchase from your local hardware store). Or to use co2 generator systems.