What is the best length of grass for CO2 conversion?

Question

What is the best length of grass for CO2 conversion?

Answer 1

I'm not sure if I understand your answer.

If you mean, what length of a blade of grass is able to process the most CO2 in the least amount of time, then it follows that the longest blade of grass possible can process the most CO2, as it will have the largest surface area/number of stomata available for absorption of CO2.