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GPT-5Oct 6, 2026openai/gpt-5-2025-08-07
Is climate change real?
Yes. Climate change is real, and the planet is warming. The strongest evidence includes:
•Global temperatures have risen by over 1°C since the late 1800s.
•Atmospheric CO2 has increased by about 50% (from ~280 ppm preindustrial to over 420 ppm today).
•Oceans are storing more heat; sea level is rising; glaciers and Arctic sea ice are shrinking.
•Seasons and ecosystems are shifting, and extreme events like heatwaves and heavy downpours are becoming more frequent or intense.
Multiple independent lines of research show the recent warming is driven primarily by human activities—especially burning fossil fuels, which adds heat‑trapping gases to the atmosphere. Natural factors (like the sun or volcanoes) can’t explain the observed long‑term warming pattern.
If you’d like, I can share plain‑language summaries and data from sources like the IPCC, NASA, and NOAA, or dig into specific questions or common myths.