greenhouse gases3
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High-Arctic Heat Tops 1,800-Year High, Says Study
Modern Spike Outmatches Naturally Driven ‘Medieval Warm Period’
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A Major Legal Victory for Climate Science
Though most attention last week focused on the Supreme Court ruling upholding federal reform of the health-care system, the U.S. Court of Appeals for the District of Columbia issued the most important judicial decision on climate change in five years. That decision upholds the Environmental Protection Agency’s power to regulate greenhouse gases, and it…
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Cuts in Non-CO2 Pollutants May Slow Climate Change
Reducing Soot and Methane Would Bring Fast Results, Says Study
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2010 Tied As Hottest Year, Say U.S. Researchers
Two Separate Analyses Add Evidence of Long-Term Warming
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Irrigation’s Cooling Effects May Mask Warming–For Now
If Water Runs Short, Some Regions May Suffer Significantly
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Amazonians Have Shot at Reducing Greenhouse Gases, Says Study
The huge Brazilian Amazon state of Mato Grosso will cut its emissions of greenhouse gases by more than half if it sticks with current plans to reduce deforestation substantially by 2020, says a new study. The research, published this week in the Proceedings of the National Academy of Sciences, uses 105 years of historical data…
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Soot Adds to Melting of Earth’s ‘Third Pole’
Himalayan Glaciers Absorbing More Sun
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How Does the Mind Grasp Climate Change?
A Research-Based Guide Tries to Narrow a Communication Gap
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CO2 Higher Today Than Last 2.1 Million Years
Study Offers Detailed Look at Past Greenhouse Gas Levels
COP31, the 2026 United Nations Climate Change Conference, aims to advance dialogue, strengthen consensus, and accelerate climate action on a global scale. From November 9–20, 2026 in Antalya, Türkiye, heads of state, ministers, scientists, business leaders, and civil society will gather to advance efforts in emission targets, climate finance, and adaptation and resilience. Once again, our experts, students, and global thought leaders from Columbia Climate School and across Columbia University are contributing to key events, sharing insights, and helping shape the dialogue toward ambitious, science-based solutions. Learn More