Across Connecticut, growers are cultivating marijuana for medical use in buildings with the exacting standards of pharmaceutical factories.

Employees reporting for work at some plants will be required to change into scrubs. Then, they will pass through a room that will emit blasts of air to remove contaminants brought in from the outside. Computers will control temperature and humidity in the plant-growing areas, where an air-filtration system will screen for molds and pests.

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