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[[Man-made]] usually refers to things not found in [[nature]] that are produced by mankind, intentionally or accidentally. It can also refer to naturally occurring things that have been produced by artificial means.
These things can range from the simplest of [[molecule]]s to gigantic [[machinery]] and [[building]]s.
Many naturally occurring [[compound|chemicals]] have been synthesized in order to acquire them more readily or in larger quantities than natural processes yield. Some everyday examples are [[vitamin]]s and [[aspirin]].