Climate change could impact Alberta’s rat population: expert Posted on August 6, 2025 by Connor Johnson CTV News July 29, 2025 For 75 years, Alberta has boasted the absence of rats. The control program has been around since 1950, when rats were declared a pest and an agricultural threat. Darcie Deangelo, an anthropologist with the U of A, joined CTV Morning Live’s Kent Morrison to discuss her new book on human and rat relations. Read Article