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GPT-5Sep 13, 2026openai/gpt-5-2025-08-07
Is climate change real?
Yes. Earth’s climate is warming, and the main cause is human activity—especially greenhouse gases from burning fossil fuels and deforestation.
Key evidence includes:
•Instrumental records showing about 1.2–1.3°C of global warming since the late 1800s
•Rapid ocean heating and rising sea levels (roughly 8 inches/20 cm since 1900)
•Widespread glacier and Arctic sea‑ice loss
•More frequent/intense heatwaves and heavier downpours
Natural factors alone can’t explain the recent, sustained warming trend; adding human‑caused greenhouse gases does. If you’d like, I can summarize expected impacts where you live or actions that make the biggest difference.