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GPT-5Nov 7, 2026openai/gpt-5-2025-08-07
Is climate change real?
Yes. Climate change is real, and the primary cause of the recent rapid warming is human activity—mainly greenhouse gases from burning coal, oil, and gas, plus deforestation.
Key evidence:
•Global temperature has risen by about 1.2°C (2.2°F) since the late 1800s.
•Atmospheric CO2 climbed from ~280 ppm pre‑industrial to over 420 ppm today.
•The oceans (which absorb most excess heat) are warming rapidly.
•Glaciers and ice sheets are losing mass; Arctic sea ice is shrinking.
•Sea level has risen by about 8 inches (20 cm) since 1900, with acceleration in recent decades.
•Heat waves, heavy rainfall, and wildfire weather are becoming more frequent/intense, consistent with physics and observations.
•The pattern of warming (surface/ troposphere warming, stratosphere cooling) matches greenhouse gas effects, not the Sun.
This conclusion is supported by every major national academy of science and repeated assessments by the IPCC, which state the human role is unequivocal.
If you’d like, I can dive into any piece of evidence, common myths, or what solutions make the biggest impact.