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[[File:Screenshot 2025-08-27 151300.png|400px|thumb|right|link=https://storymaps.arcgis.com/collections/8c517b063c81449d8fba71ca02d4278f?item=6|Maps showing predicted increases in temperature and precipitation for Toronto Region over the 21st Century under the high GHG emission scenario. Adapted from TRCA (2025)<ref>TRCA. 2025. Watershed and Ecosystems Reporting Hub. https://storymaps.arcgis.com/collections/8c517b063c81449d8fba71ca02d4278f?item=6</ref>. Click on the image to go to TRCA's Watershed and Ecosystems Reporting Hub and explore future climate trends.]]
[[File:Screenshot 2025-08-27 151300.png|400px|thumb|right|link=https://storymaps.arcgis.com/collections/8c517b063c81449d8fba71ca02d4278f?item=6|Maps showing predicted increases in temperature and precipitation for Toronto Region over the 21st Century under the high GHG emission scenario. Adapted from TRCA (2025)<ref>TRCA. 2025. Watershed and Ecosystems Reporting Hub. https://storymaps.arcgis.com/collections/8c517b063c81449d8fba71ca02d4278f?item=6</ref>. Click on the image to go to TRCA's Watershed and Ecosystems Reporting Hub and explore future climate trends.]]
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==Overview==
==Overview==
Climate change refers to long-term alterations in temperature, precipitation, wind patterns, and other aspects of the Earth’s climate system, largely driven by human activities. The dominant cause is the increased concentration of greenhouse gases, primarily from fossil fuel combustion, industrial processes, and land-use change (IPCC, 2021)<ref>IPCC. 2021. Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press</ref>.
Climate change refers to long-term alterations in temperature, precipitation, wind patterns, and other aspects of the Earth’s climate system, largely driven by human activities. The dominant cause is the increased concentration of greenhouse gases, primarily from fossil fuel combustion, industrial processes, and land-use change (IPCC, 2021)<ref>IPCC. 2021. Climate Change 2021: The Physical Science Basis. Contribution of Working Group I to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press</ref>.