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GPT-5Oct 17, 2026openai/gpt-5-2025-08-07
Is climate change real?
Yes. Climate change is real, and the primary cause of the recent warming is human activity—mainly burning fossil fuels and deforestation.
Why scientists are confident:
•Physics: Greenhouse gases like CO2 trap heat; adding more increases warming.
•Measurements: Global average temperature has risen about 1.1–1.3°C since the late 1800s; oceans are gaining heat; sea level is rising; glaciers and Arctic sea ice are shrinking.
•Fingerprints: The pattern of warming (troposphere warming, stratosphere cooling, nights warming faster than days, more heat retained at CO2 wavelengths) matches greenhouse-gas forcing and not solar or volcanic changes.
•Consensus: Every major scientific academy and the IPCC conclude human influence is the dominant cause of observed warming since the mid-20th century.
If you’d like, I can share concise sources or dive into any part in more detail.