CBC "What On Earth" Newsletter (25 January 2019)

Light pollution: See the difference

John Barentine, director of public policy at the International Dark-Sky Association (IDA), said when it comes to the impact on human health, "the indications are that light definitely has a role to play in that."

Barentine said that when people make choices about lighting, "they should think about the proper amount of light that is deployed in the proper place at the proper time — which means time of night, but also duration — and they'd think of the proper spectrum, or colour of light."

Read more: https://www.cbc.ca/news/technology/what-on-earth-newsletter-avocados-road-salt-light-pollution-1.4991627