the process is Photosynthesis
Plants don't combine hydrogen and carbon dioxide directly; if they did (and did so in a 1-to-1 ratio), the result would be formaldehyde. Instead, plants combine carbon dioxide and water in such a way as to produce carbohydrates (particularly glucose) and oxygen in a multi step complex synthetic process.
light independent
Photosynthesis is where plants convert energy from the sun into chemical energy. The process of fixing carbon dioxide into a carbohydrate occurs during the Calvin Cycle stage of photosynthesis.
Chemoautotrophs are organisms that gain energy saved in inorganic molecules. The carbon dioxide and water molecules are then transformed into carbohydrates and oxygen.
Calvin Cycle :}
The energy for the reactions that turn carbon dioxide into carbohydrates comes from sunlight. This process, known as photosynthesis, occurs in plants and some microorganisms, where sunlight is absorbed by chlorophyll to drive the conversion of carbon dioxide and water into carbohydrates like glucose.
PHOTOSYNTHESIS
The process is called photosynthesis. During photosynthesis, plants use sunlight to convert carbon dioxide and water into glucose and oxygen.
Essentially all free energy utilized by biological systems arises from solar energy that is trapped by the process of photosynthesis. The basic equation of photosynthesis is deceptively simple. Water and carbon dioxide combine to form carbohydrates and molecular oxygen.
When carbon and oxygen combine chemically, they form carbon dioxide (CO2), which is a colorless gas commonly found in the atmosphere. This process usually occurs during combustion or respiration.
Plants combine carbon dioxide and water through photosynthesis to produce glucose (sugar), their primary source of energy. Oxygen is also released as a byproduct of this process.
During cellular respiration, carbohydrates combine with oxygen to produce carbon dioxide, water, and energy in the form of ATP. This process occurs in multiple stages, including glycolysis, the citric acid cycle, and oxidative phosphorylation in the mitochondria.