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Warfare, Not Climate, Is Driving Resurgent Hunger in Africa, Says Study
A 2009-2018 analysis of 14 countries teases out the factors behind reversals in food security. Conflict, not drought, is behind much of it.
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Europe’s ‘Great Famine’ Years Were Some of the Soggiest in Centuries
Unrelenting rains led to a miserable famine in Europe from 1315-1317. Just how wet was it? A new study reveals that the beginning of the famine included some of the wettest years in the last 700 years.
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Double Trouble: The Importance of Thinking About Compound Risk
Compound risk — when multiple risks occur simultaneously, or one after another — was the topic of a recent discussion as part of the Resilience Media Project, a part of the Initiative on Communication and Sustainability at the Earth Institute.
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As Temperatures Rise, More California Forests Will Burn
Park Williams and Richard Seager, climate experts at Lamont-Doherty Earth Observatory, discuss why California wildfires are expected to expand and intensify with climate change.
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Longer Summer Stretches of Drought, Extreme Heat and Flooding Expected in a Warming World, Study Says
The changes could affect health, agriculture and ecosystems, the study suggests.
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Climate Change Could Revive Medieval Megadroughts in U.S. Southwest
Study picks apart factors that caused severe, long-lasting droughts and suggests increased risk for future.
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Scientists See Fingerprint of Warming Climate on Droughts Going Back to 1900
In an unusual new study, scientists say they have detected a growing fingerprint of human-driven global warming on global drought conditions starting as far back as 1900.
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Drought: A Wide-Angle Picture
A new book, the second in a series of primers with the Earth Institute imprint, provides an interdisciplinary overview drought, bringing together many fields including climate science, hydrology and ecology.
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How Pollution and Greenhouse Gases Affect the Climate in the Sahel
A recent study is the first to show that pollutants and greenhouse gas emissions have directly affected the 20th century evolution of rainfall over a region.

AGU25, the premier Earth and space science conference, takes place December 15-19, 2025 in New Orleans, Louisiana. This year’s theme—Where Science Connects Us—puts in focus how science depends on connection, from the lab to the field to the ballot box. Once again, Lamont-Doherty Earth Observatory and Columbia Climate School scientists, experts, students, and educators are playing an active role, sharing our research and helping shape the future of our planet. #AGU25 Learn More
