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GPT-5Sep 23, 2026openai/gpt-5-2025-08-07
Is climate change real?
Yes
Yes.
•Earth has warmed about 1.2°C (2.2°F) since the late 1800s, mainly from greenhouse gases released by burning fossil fuels and deforestation.
•Multiple, independent lines of evidence show this: rising air and ocean temperatures, shrinking glaciers and Arctic sea ice, sea level up ~8–9 inches since 1880, earlier springs, shifting species ranges, and more frequent/intense heat extremes.
•The physics is well-understood: CO2, methane, and other gases trap heat. Measurements show more of the Sun’s energy staying in the Earth system and less heat escaping to space at the CO2 absorption bands.
•Scientific bodies worldwide (e.g., the IPCC and national academies) conclude the recent warming is real and primarily human-caused.
If you’d like, I can share plain-language sources or explain how this affects where you live.