What produces H2O CO2 and ATP?

Answer 1

Respiration of sugar

Life on earth is carbon based, and since matter is neither created nor destroyed in ordinary chemical reactions, combustion of sugar also produces carbon dioxide and water as does the burning of wood, gasoline, fuel oil, and most other natural substances. The atoms in these substances are not destroyed but rather rearranged.

Unfortunately, combustion is not always efficient and so you often get other noxious substances which are why you always make sure to have good ventilation when burning.

Answer 2

Combustion reactions produce water and carbon dioxide. One example is the combustion of methane, CH4.

CH4 + 2O2 ---> 2H2O + CO2

Answer 3

One (of many) is animal respiration. But it also produces energy.