Climate175
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From Good Intentions to Deep Decarbonization
The most important issue is whether countries will achieve their 2030 targets in a way that helps them to get to zero emissions by 2070. If they merely pursue measures aimed at reducing emissions in the short term, they risk locking their economies into high levels of emissions after 2030. The critical issue, in short,…
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Watch and Learn: Climate Countdown
Wondering what’s going on in Paris? And why you should care? A team of young people working on climate issues from many perspectives—policy, science, media, activism—have created Climate Countdown, a video web series that follows the people who are crafting paths toward a meaningful climate agreement at the Paris climate summit.
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From Waterloo to Paris: Students Serve as Delegates for Kiribati
Students from 28 masters in development practice programs, including the Earth Institute’s Masters in Public Administration-Development Practice at Columbia, are participating in various ways at the climate talks in Paris.
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From Copenhagen to Paris: Moving From Talk to Action on Climate Change
Globally, individual nations have volunteered greenhouse gas reduction targets in anticipation of the Paris meetings. Unlike Copenhagen, where calls for mandatory reductions and transfer payments to the developing world caused the collapse of any potential agreements, the world community seems more realistic as it approaches the Paris meetings.
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Growing the Global Economy Without Destroying the Planet
We need to focus our attention on the existing systems of management and influence now in place and attempt to turn them toward sustainability. This includes national, state and especially local governments, corporations and nonprofit organizations.
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Six Tough Questions About Climate Change
People often ask certain tough questions about climate change— about the costs of cutting carbon emissions, the feasibility of transitioning to renewable energy, and whether it’s already too late to do anything about climate change. Laura Segafredo, manager of the Deep Decarbonization Pathways Project, answers these questions.
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Conversations with a Climatologist
Tony Barnston, a scientist at the International Research Institute for Climate and Society, took a few hours out of his day and answered questions on a Reddit “Ask Me Anything” session.
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Shrinking Glaciers: A Chronology of Climate Change
With new data, scientists can track back what glaciers did in the past, and how it is related to climate change. This provides a link to predict what could be happening in the next 100, 200, 500 years.
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Why are Past Surface Temperatures and CO2 Concentrations Important?
Kelsey Dyez, a geochemist at the Lamont-Doherty Earth Observatory, describes how the carbon dioxide content of the atmosphere influences climate.
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
