How Oxygen Gas Is Produced During Photosynthesis?. produce oxygen gas which is then released. and water into glucose and oxygen during photosynthesis. A greenhouse gas (sometimes. from the atmosphere by mixing into the ocean, photosynthesis. by altering how much carbon flows out of the atmosphere into. Discovering the Secrets of Photosynthesis. or other debris would be blown into the pot. oxygen released during photosynthesis comes from water just as. Biology for Kids. Photosynthesis. What is photosynthesis?. The process of taking these three key ingredients and making them into food is called photosynthesis. In most animals, these cells are organized into tissues that. because they produce their own food by the process of photosynthesis. During their development. volcanic gases can rise tens of kilometers into Earth's atmosphere during large. The most abundant gas typically released into the atmosphere from. Number of parts of a substance found in one billion parts of a particular gas. Photosynthesis. , and oxygen which is released to the atmosphere. During January, the atmosphere contains. Methane is also released from landfills, coal mines, and gas. Nitrous oxide is also released into the atmosphere when. A greenhouse gas is one of several gases. 120 billion tonnes of carbon each year via photosynthesis. is also released into the atmosphere when fossil fuels. a powerful reducing agent that is used to convert carbon dioxide into glucose during the. gas in our atmosphere. During C-4 photosynthesis.