roads
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Cutting the Salt in Winter Road Maintenance
As the capital and environmental costs of road salt continue to mount, has the time come to ask whether we’re putting too much of it on our streets?
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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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The (Somewhat Less Fast) Growing Human Footprint
The human footprint continues to expand, with three quarters of earth’s land surface now experiencing measurable pressures from buildings, roads, crops, pastures and other human structures and activities, according to a new report. But the report also finds an encouraging trend: In recent years, growth in the footprint has lagged far behind population and economic…
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Roads: An Essential Element of Development
Roads data are critical to planning and development of rural transportation in developing countries, where better transportation systems can help improve livelihoods.
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
