
Renewable energy (or green energy) is from that are replenished on a . The most widely used renewable energy types are , , and . and are also significant in some countries. Some also consider , although this is controversial. Rene.

Glycogen is a multibranched of that serves as a form of energy storage in , , and bacteria. It is the main storage form of glucose in the human body. Glycogen functions as one of three regularly used forms of energy reserves, being for very short-term, glycogen being for short-term an.