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GPT-5Oct 12, 2026openai/gpt-5-2025-08-07
Are humans responsible for climate change?
Yes. The overwhelming scientific evidence shows humans are the primary cause of the recent warming of Earth’s climate.
Why scientists are confident:
•Greenhouse gases from human activities—burning fossil fuels, deforestation, and some industrial processes—have risen sharply and trap more heat.
•The “fingerprints” match: the lower atmosphere warms while the stratosphere cools; nights and winters warm faster than days and summers; land warms more than oceans; the Arctic warms fastest.
•Climate models only reproduce the observed warming when human emissions are included; natural factors alone (solar changes, volcanoes) can’t explain it.
•Independent measurements agree: rising ocean heat content, melting glaciers and ice sheets, sea-level rise, and more frequent heat extremes.
In short: humans are responsible for essentially all of the observed global warming since the mid-20th century. If you’d like, I can dive into any of these lines of evidence or how attribution studies work.