"Graves' disease is an immune system disorder that results in the overproduction of thyroid hormones (hyperthyroidism). Although a number of disorders may result in hyperthyroidism, Graves' disease is a common cause."
-https://www.mayoclinic.org/diseases-conditions/graves-disease/symptoms-causes/syc-20356240
all of the above can be considered ecosystems
<span>pollution, mineral location, and new energy sources
space exploration and national defense
microbiology advancements and cloning procedures
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