• Humans have collected and grown mushrooms for food for thousands of years.
  • Yeasts are used in bread baking and brewing alcoholic beverages.
  • Fungi compete with bacteria for nutrients and space, and they parasitize insects that eat plants.
  • They are a major source of citric acid (vitamin C) and produce antibiotics such as penicillin, which has saved countless lives.
  • They can be genetically engineered to produce insulin and other human hormones, and are model research organisms.
  • They reduce the need for pesticides and other toxic chemicals.
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