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GPT-5Sep 30, 2026openai/gpt-5-2025-08-07
Is climate change real?
Yes. Climate change is real, and the dominant cause of recent warming is human activity—mainly burning fossil fuels and deforestation.
What we observe:
•Global average temperature has risen by about 1.2°C since the late 1800s.
•Oceans are heating and sea level is rising as water expands and land ice melts.
•Glaciers and Arctic sea ice are shrinking.
•Heat waves are more frequent and intense; heavy rainfall events have increased in many regions; some droughts and wildfire seasons are worsening.
Why we’re confident:
•The pattern of change matches greenhouse-gas “fingerprints” (troposphere warming while the stratosphere cools, nights warming faster than days, faster warming over land and in the Arctic).
•Natural drivers like solar cycles and volcanoes can’t explain the magnitude or pattern of recent warming; adding human-emitted greenhouse gases does.
If you’d like, I can share accessible sources or dive into any piece (evidence, causes, or projected impacts where you live).