There is only one gas. It is the co2 gas.
Oxygen.
CO2 is the using gas. It is using for make glucose.
pores in the leaves and stomates allow gases to enter and leave the plant
photosynthesis uses carbon dioxide and water to release oxygen.
glucose is made during photosynthesis
The hydrogen atoms in the water molecule are used during photosynthesis. Water molecules are split into oxygen, protons, and electrons during the light-dependent reactions in photosynthesis.
Reactants used during photosynthesis are H2O (water) and CO2 (carbon dioxide) with sunlight energy.
carbon dioxide
Many gasses were used during World War Two. The use of Gasses was more popular in WWI however they were used in WW2 as well. Gasses used in direct combat are various nerve gasses, mustard gas, cyanide, carbon monoxide and cyanogens chloride. However Hitler also employed the use of ZyclonB to kill people in Gas Chambers.
In a photosynthesis sun light and water are used to make food for plants (except plants at the bottom of the sea).
Glucose and oxygen are used up during respiration.
Light energy is used in photosynthesis. It is transformed into chemical energy.