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CAN: Night sky by-law uncovers new problem for greenhouses

Since Kingsville adopted a bylaw to protect the night sky just over a year ago, compliance by greenhouses in the area has been good. However, the investigation into one greenhouse that did not comply has turned up a new vexing problem.

Turns out, the greenhouse did have curtains designed to contain the light, but they were not being used. Closing the curtains all the way may cut down on light pollution, but it also retains heat, humidity, and moisture, and that can be bad for the crops.

Administrative staff in Kingsville have reached out to researchers at the Harrow Research Centre, the Ontario Ministry of Agriculture, and the University of Guelph who are studying light abatement.

The study will wrap up in 2023, but interim results will be released.

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