water conservation
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How Road Salt Harms the Environment
Recent research indicates that salt is accumulating in the environment and poses an emerging threat both to ecosystems and human health.
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In Jharkhand, Using an Old Technique for Sustainable Water
The Indian state of Jharkhand has plentiful rainfall, but most of that water runs off before it can be put to use by farmers, who struggle to make a living. To help improve irrigation and crop productivity, the Centers for International Projects Trust and Ranchi’s Birsa Agricultural University turned to a simple traditional technology, “dobhas,”…
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Daniel Hillel, Pioneer in High-Efficiency Irrigation, to Receive World Food Prize
A Career in 30 Nations, From the 1950s to Today
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Signals of Past Say Big Droughts Can Hit U.S. East
Tree Rings Show Dry Periods Worse Than Any Historical Record
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
