can u kill plants with 2much co2

hey guys i have 2 two litre bottles co2 bottles in a closet is that too much or is that possible
thanks in advance

homemade or compressed?

homemade dude

The short answer is yes. It depends on how much your producing. I used to do homemade and never killed a plant with it. Acually worked very well. I would say it's posible but unlikely. Whats the problem?