greenhouse gases
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Unused Natural Gas Behind NYC’s $300 Million Waste of a Potent Greenhouse Gas
New research may offer cities an overlooked pathway for reducing methane emissions while potentially saving consumers millions of dollars lost to wasted natural gas.
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New Report Provides a Ranking of Sustainability Around the World
The 2024 Environmental Performance Index, produced by centers at Columbia Climate School and Yale, offers a scorecard for 180 countries based on their climate change mitigation, ecosystem vitality and environmental health.
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Without Changes, Global Food Systems May Drive World Beyond Climate Targets, Says Study
Production of meat, dairy and rice are the leading sources of food-related emissions. Improved management practices and changes in diet could go a long way to addressing the issues.
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Pivoting on Greenhouse Gas Regulation
Action will now need to focus on state and local governments along with powerful corporations and institutions to continue forward motion in the transition to environmental sustainability.
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Food Systems Offer Huge Opportunities to Cut Emissions, Study Finds
Researchers drilling into the many moving parts of food systems say that greenhouse-gas emissions have been systematically underestimated.
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How Exactly Does Carbon Dioxide Cause Global Warming?
CO2 molecules make up only a small percentage of the atmosphere, but their impact on our climate is huge. The reason comes down to physics and chemistry.
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You Asked: How Can I Find Out the Carbon Footprints of Different Foods?
We look at research from the Earth Institute and beyond to answer questions about the impacts of beef, soy, and more.
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Your Earth Questions, Answered
In celebration of Earth Month and Earth Day, our scientists are tackling reader questions on science and sustainability.
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Tropical Cyclones on Track to Grow More Intense as Temperatures Rise
Aerosols have compensated for greenhouse gases, but won’t in future
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
