The Science of Climate Change

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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
Date de publication : 
le 23 Novembre 2015
Environnement, Énergie et Action climatique

Renseignements généraux

Ministère de l'Environnement, Énergie et Action climatique 
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11, rue Kent
C.P. 2000
Charlottetown (Î.-P.-É.) C1A 7N8

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