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Claude Sonnet 5Sep 4, 2026anthropic/claude-sonnet-5-20260630

Is climate change real?

Climate Change: Scientific Consensus

Yes, climate change is real and well-documented. Here's a summary of the evidence:

Key Facts

Temperature rise: Global average temperatures have increased by about 1.1°C (2°F) since pre-industrial times, with the last decade being the warmest on record.

Multiple lines of evidence:

•Rising sea levels (~8-9 inches since 1880)
•Shrinking ice sheets and glaciers
•Ocean warming and acidification
•Increasing frequency of extreme weather events
•Shifting plant and animal ranges

Scientific Consensus

Approximately 97-99% of actively publishing climate scientists agree that:

1.The climate is warming
2.Human activities (primarily burning fossil fuels) are the dominant cause
3.This is happening at a pace unprecedented in recent geological history

Major Organizations in Agreement

This consensus is supported by:

•NASA
•NOAA
•IPCC (Intergovernmental Panel on Climate Change)
•National academies of science from multiple countries
•Major scientific organizations across disciplines

What Remains Debated

While the core science is settled, there's legitimate ongoing discussion about:

•Specific regional impacts and timing
•Best policy responses
•Economic tradeoffs of different solutions
•Precise climate sensitivity figures

Would you like more detail on any particular aspect—the evidence, causes, impacts, or potential solutions?

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