When a mixture of limestone and clay is heated in a rotary kiln cement is produced. burning a mixture of methane and air heats the kiln. carbon dioxide is one of the main gases give two reasons why. and give a reason why sulphur dioxide has a high percentage coming out of the kiln?

(2) Since this reaction requires a large amount of energy, fuel (usually coal) is burned, which produces carbon dioxide

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year