Based on plausible emission scenarios, average surface temperatures could rise between 2☌ and 6☌ by the end of the 21st century. Models predict that as the world consumes ever more fossil fuel, greenhouse gas concentrations will continue to rise, and Earth’s average surface temperature will rise with them. These natural causes are still in play today, but their influence is too small or they occur too slowly to explain the rapid warming seen in recent decades. In Earth’s history before the Industrial Revolution, Earth’s climate changed due to natural causes unrelated to human activity. Why Do Scientists Think Current Warming Isn’t Natural? But the current climatic warming is occurring much more rapidly than past warming events. How Does Today’s Warming Compare to Past Climate Change?Įarth has experienced climate change in the past without help from humanity. Global warming is the unusually rapid increase in Earth’s average surface temperature over the past century primarily due to the greenhouse gases released by people burning fossil fuels.
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