explainers4
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Lead Fallout From Notre Dame Fire Was Likely Overlooked
New study estimates that a ton of lead dust may have been deposited in parks, homes, and schools near the cathedral.
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How Will Climate Change Impact the Gulf Stream?
Evidence suggests that this major ocean current, which influences the weather in parts of Europe and the U.S., is already changing.
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You Asked: How Can We Track Corporate Sustainability Measures?
An Earth Institute expert explains how to dig up a company’s sustainability records.
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You Asked: Do Artificial and Enhanced Wetlands Work?
A paleoecologist explains why it’s actually a bad idea to “drain the swamp.”
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You Asked: Does Carbon Capture Technology Actually Work?
We have the technology to capture and store millions of tons of carbon globally. Now all that’s lagging is the policy.
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You Asked: Should We All Go Vegetarian or Vegan to Reduce Our Carbon Footprint?
Short answer: Moderation is key.
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You Asked: Are My Efforts to Reduce My Carbon Emissions Too Minor to Matter?
Individual efforts to reduce carbon emissions could, in fact, go a long way in making a difference.
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You Asked: How Does Climate Change Help to Spread Diseases?
An Earth Institute expert explains why climate change is great for mosquitoes (but bad for people), and why we shouldn’t really worry about prehistoric germs coming back to life.
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You Asked: How Much Does the U.S. Subsidize Renewable Energy Versus Fossil Fuels?
The answer might seem cut and dried, but it’s not as simple as you might think.
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
