Hello again and thank you for answering my question earlier. One follow up. I understand you are saying that increase in CO2 is an issue but CO2 is not a pollutant. It was present the day we were born. So why does adding CO 2 to the atmosphere hurt us? There are 400 trees for every person on earth and each tree provides oxygen for approximately 3 people. Are we at risk of O2 issues if we reduced carbon? I know the 21 to 12 % rule of oxygen inhaled, but have you measured the back end of the reduction?