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GPT-5Oct 5, 2026openai/gpt-5-2025-08-07
Is climate change real?
Yes
Yes. Climate change is real, it’s already happening, and the primary cause is human activity—mainly burning fossil fuels and deforestation.
What we know, in brief:
•Measured warming: Earth’s average surface temperature has risen by roughly 1.1–1.3°C (2.0–2.3°F) since the late 1800s.
•Clear human fingerprint: Increased greenhouse gases trap more heat; we also see telltale signs like stratospheric cooling, more downwelling infrared radiation, and the fossil-fuel carbon isotope signature in the air.
•Consistent observations: Rising ocean heat content and sea levels, retreating glaciers and Arctic sea ice, earlier spring thaws, more frequent extreme heat, and heavier downpours.
•Strong scientific consensus: Independent lines of evidence and assessments by national academies and the IPCC agree that recent warming is overwhelmingly human-caused.
If you’d like, I can share accessible sources, charts for your area, or discuss common myths and questions.