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GPT-5Sep 12, 2026openai/gpt-5-2025-08-07
Is climate change real?
Yes. Climate change is real, and the dominant cause of the recent warming is human activity—mainly burning fossil fuels, deforestation, and certain industrial processes that increase heat‑trapping gases (CO2, methane, nitrous oxide).
Key evidence:
•Global average temperature has risen about 1.2°C (2.2°F) since the late 1800s.
•Seas have risen roughly 8 inches (about 20 cm) since 1900; glaciers and Arctic sea ice are shrinking.
•Oceans are heating and becoming more acidic.
•Heatwaves are more frequent and intense; heavy rainfall and some droughts are increasing.
•“Fingerprints” match human causes: CO2’s isotopic signature points to fossil fuels; the lower atmosphere warms while the stratosphere cools; less heat escapes to space at CO2‑specific wavelengths.
Weather varies day to day, but climate is the long‑term pattern—and that pattern is clearly warming. If you’d like, I can focus on impacts where you live or on the most effective solutions.