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GPT-5Nov 6, 2026openai/gpt-5-2025-08-07
Is climate change real?
Yes. Climate change is real, and the dominant cause of the current warming is human activity—chiefly burning fossil fuels and deforestation.
Key evidence in brief:
•Measured warming: Global surface and ocean temperatures have risen markedly since the late 1800s.
•Greenhouse gases: CO2 and methane concentrations have surged due to human emissions; their heat‑trapping effect is well‑established physics.
•Consistent “fingerprints”: Nights warming faster than days, the lower atmosphere warming while the upper cools, shrinking glaciers and ice sheets, rising sea levels, shifting seasons and extremes—all predicted patterns now observed.
•Attribution studies: When models include human emissions, they match observed warming; without them, they don’t.
If you’d like, I can point you to accessible summaries from the IPCC, NASA, or NOAA, or dig into specific questions or misconceptions you have.