Plants use sunlight energy to take carbon dioxide and water molecules are rearrange them to make oxygen gas and glucose, which stores the energy (battery). Animals/humans
"burn" the glucose using oxygen, and then we help to recycle the carbon dioxide and
water when we breathe out.
So why does the sun have to keep supplying more energy? Why isn't the energy also
recycled when the atoms are recycled?

What is a difference between systemic and pulmonary circulation? a. systemic circulation carries oxygenated blood to the lungs and pulmonary circulation carries deoxygenated blood to the body. b. systemic circulation carries deoxygenated blood to the lungs and pulmonary circulation carries oxygenated blood to the body. c. systemic circulation carries deoxygenated blood to the body and pulmonary circulation carries oxygenated blood to the lungs. d. systemic circulation carries oxygenated blood to the body and pulmonary circulation carries deoxygenated blood to the lungs.