Great Green Wall
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The Earth Is Getting Drier
Desertification is occurring in many parts of the world, including the western U.S., Brazil, most of Europe, Asia and central Africa. Is it too late to reverse it?
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Land Restoration Can Profoundly Benefit People and the Environment
A recent webinar highlighted how returning land to a more natural state can help the climate, the local environment, and nearby communities.
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You Asked: Can the Great Green Wall Stop the Sahara From Expanding?
A climate scientist answers readers’ questions about an initiative that would plant a vast wall of trees to combat the effects of climate change.
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
