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GPT-5Oct 27, 2026openai/gpt-5-2025-08-07
Is climate change real?
Yes
Yes. The Earth is warming, and the primary cause is human activity—mainly burning fossil fuels, deforestation, and certain agricultural practices that increase heat‑trapping gases.
Key evidence includes:
•Global temperatures have risen by more than 1°C since the late 1800s.
•Oceans are heating up and expanding, driving sea‑level rise; glaciers and ice sheets are losing mass.
•Atmospheric CO2 has increased dramatically since the industrial era, and its heat‑trapping effect is well‑understood physics.
•Fingerprints of human influence show up in patterns of warming (troposphere warming, stratosphere cooling) that natural cycles alone can’t explain.
•Increases in extreme heat, heavy rainfall, and wildfire conditions are consistent with a warming climate.
If you’d like, I can share plain‑language summaries from the IPCC or dig into any of these lines of evidence.