The Science of Climate Change

Key Messages

  • Warming over the 20th century is indisputable and largely due to human activities.
  • Canada’s rate of warming is about twice the global rate: a 2ºC increase globally means a 3 to 4ºC increase for Canada.
  • Effects will persist for centuries because greenhouse gases (GHGs) are long-lived and the oceans are warming.
  • Cumulative CO2 emissions largely determine ultimate warming. A 2ºC warming target may still be attainable, but we are already 65% of the way to the associated carbon limit or budget and global emissions must peak before mid-century.
  • GHG emissions need to become net zero in order to stabilize climate at any temperature.

    This is a graphic logo for Environment and Climate Change Canada.
Graphic Source: Environment and Climate Change Canada
Published date: 
November 23, 2015
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General Inquiries

Department of Communities, Land and Environment
4th Floor, Jones Building
11 Kent Street
PO Box 2000
Charlottetown, PE   C1A 7N8

Phone: (902) 368-5044
Toll-free: 1-866-368-5044
Fax: (902) 368-5830

CLE@gov.pe.ca