• 1. Phototropic bacteria, like cyanobacteria, made oxygen available on Earth 2.3 billion years ago. Without them, Earth would not be suitable for animal life!
  • 2. Bacteria, fungi, actinomycetes, molds, and protozoa all play an important role in decomposing organic matter, breaking down the carbon, phosphate, and nitrogen to serve as nutrients for other living organisms.
  • 3. Many cause diseases and death in animals and plants, which are then decomposed by other bacteria. It’s all a part of a cycle.
  • 4. Microbes are the bottom of the food chain. They serve as a food source for other tiny organisms, like amoebas and paramecia.
  • 5. They play a role in climate change. As the global temperature rises, the carbon produced by decomposition enters the atmosphere as carbon dioxide through soil respiration. Carbon dioxide is a greenhouse gas that traps heat inside the Earth’s atmosphere.