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GPT-5Sep 7, 2026openai/gpt-5-2025-08-07
Is climate change real?
Yes. The planet is warming and the dominant cause is human activities—mainly burning fossil fuels, deforestation, and certain industrial and agricultural practices that raise greenhouse-gas levels.
Key evidence:
•Global average temperature has risen by about 1.1–1.3°C since the late 1800s.
•Oceans are storing record amounts of heat; sea level has risen ~20–25 cm since 1900 and is accelerating.
•Glaciers and the Greenland/Antarctic ice sheets are losing mass; Arctic sea ice is shrinking.
•Heatwaves and heavy rainfall events are becoming more frequent and intense; oceans are acidifying.
Why scientists are confident:
•The physics of greenhouse gases is well established.
•“Fingerprints” match human-caused warming (e.g., troposphere warms while stratosphere cools; nights warm faster than days; land warms faster than oceans; more warming at high latitudes).
•Models only reproduce observed trends when human emissions are included.
Consensus:
•The IPCC states it is “unequivocal” that humans are warming the climate, a conclusion endorsed by national academies and agencies worldwide (e.g., NASA, NOAA, WMO).
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