Why is a leaf? Ask the question of twenty-five of your friends and if five can give the correct answer I will be surprised. The green leaf is the food factory for the world. It is the plant organ that captures the energy of the sun and in the process of photosynthesis builds of carbohydrates from carbon dioxide and water and stores this energy in potential form. Later, through oxidation processes, this energy is released and does most of the work of the world. The green plant connects the inorganic world with the organic world and our energy is directly secured from the organic.
©1932 by Iowa State Teachers College
Lantz, C. W.
"The Place of the Green Leaf in the World,"
Science Bulletin: Vol. 4:
8, Article 6.
Available at: https://scholarworks.uni.edu/science_bulletin/vol4/iss8/6