Question

State of importance of the solubility of CO2 and O2 in water

Answer 1

As with other gases, the solubility of carbon dioxide in water decreases as the temperature increases. ... This will increase the atmospheric concentration of CO2, causing further increases in temperature of the atmosphere, etc.
Gas Solubility*
Methane 0.0023
Nitrogen 0.0019
Oxygen 0.0043
Sulfur dioxide 11.28

Answer 2

Percent saturation is the amount of oxygen in a liter of water relative to the total amount of oxygen that the water can hold at that temperature. This is a measure of the amount of molecular oxygen in milligrams required to convert all the organic molecules contained in 1.0 liter of a water sample to CO2.