Some organisms, like plants, use the sun s energy directly while others, like animals, get their energy from eating plants or other animals. This energy is transferred from organism to organism in the form of molecules.
Sugar is an example of such a molecule.
When the sun strikes a sugarcane plant, the leaves use the sun s energy to build a sugar molecule out of carbon dioxide and oxygen from the atmosphere, and water absorbed by the roots. When we eat this sugar, our digestive system converts this sugar molecule back into carbon dioxide, oxygen, and water, and we use the energy that the plant originally absorbed from the sun. This living machine takes advantage of nature s energy passing system by putting different types of organisms into each tank and allowing energy-transferring molecules to circulate from tank to tank. The first tank in the system is the Fish Production tank. The objectives of this tank is to raise food and provide fertilizer for the plants growing in the troughs.