Final answer:
True, perchlorate is a waterborne contaminant resulting from propellants and rocket fuels. It's an industrial chemical that can contaminate water and soil and might interfere with thyroid gland function.
Step-by-step explanation:
The prechlorate statement is true. Perchlorate is indeed a waterborne contaminant that can be left over from propellants and rocket fuels. It is an ion that comes from the breakdown of certain chemicals, mainly used in industrial chemicals as well as in rocket fuel and explosives. This can lead to contamination of water and soil. There are concerns about potential health effects because prechlorate can interfere with iodine uptake in the thyroid gland.
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