Articles on Precautionary principle

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A worker is seen cleaning surfaces inside a long-term care home. THE CANADIAN PRESS/Darryl Dyck

Omitting indoor air quality from COVID‑19 guidance for shelters and long‑term care homes is a grave mistake

Residents of group homes and long-term care are at high risk for COVID-19. But an important aspect has been left out of Public Health Ontario’s guidance for these facilities: indoor air quality.
Mosquito eggs float on the surface of a pond. The insecticide Bti is used to kill mosquito larvae, but it could also harm frogs. (Shutterstock)

Are mosquito‑killing natural pesticides unintentionally harming frogs?

The insecticide Bti kills target organisms like mosquitoes and blackflies, but new research shows it may also have negative effects on non-target species like frogs.

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