TORONTO, April 4, 2022 – Deep cuts to global greenhouse gases are imperative to mitigate climate change and keep global warming to 1.5 C, says a report released today by Working Group III of the United Nation’s Intergovernmental Panel on Climate Change (IPCC). York University Professor Patricia Perkins of the Faculty of Environmental and Urban Change is a lead author of a new chapter in the report (Chapter 5) which tackles the social aspects of mitigation.