CO2 isn't stored in grass; carbon is. I know "carbon" is often used as shorthand for CO2 but in this case it's carbon. The plant takes in CO2 expels O2 and the carbon is used by the plant to form things like cellulose. When the grass is dead it breaks down in various ways and the end point is that the carbon atoms eventually recombine with oxygen and you get back the same amount of CO2. In natural settings some of the carbon from plants can end up back in the soil but probably not in the case of a manicured lawn like you'd find at Disney.
CO2 isn't stored in grass; carbon is. I know "carbon" is often used as shorthand for CO2 but in this case it's carbon. The plant takes in CO2 expels O2 and the carbon is used by the plant to form things like cellulose. When the grass is dead it breaks down in various ways and the end point is that the carbon atoms eventually recombine with oxygen and you get back the same amount of CO2. In natural settings some of the carbon from plants can end up back in the soil but probably not in the case of a manicured lawn like you'd find at Disney.
That being said fuck fake grass.