Researchers and businesses are finding innovative ways to use carbon dioxide captured from power plants or the air.

The report describes how “negative emissions technologies” that remove and sequester carbon dioxide from the air will need to play a significant role in mitigating climate change.

In a variety of talks and panels, experts gathered on campus to discuss ideas and technologies that can help us overcome the planet’s biggest environmental challenge.

The initiative will help to drive business models, investment vehicles, and policies for a new carbon economy.

Lenfest Center researchers are working with a Chinese steel company on a way to treat and reuse waste slag using carbon sequestration technology.

The Earth Institute digs into the past, tracks the present and models the future of climate. We explore the broader issues surrounding climate change, seek ways to apply our knowledge to real solutions, and nurture collaboration among faculty and researchers in the natural sciences, social sciences and humanities, law, public health, engineering, architecture and urban planning.

Important global ecosystems like the Amazon rainforest and Great Barrier Reef are in danger of breaking down because of a combination of local pressures and climate change, but better local management could help make these areas more resilient.

Visitors to Lamont-Doherty Earth Observatory’s open house on Oct. 11 could tune in to a performance of “Salty Folk” by Superhero Clubhouse, a collective of artists and environmental advocates. Created by Jeremy Pickard and Nate Weida, the play uses music and humor to illustrate the history and importance of New York Harbor through the “eyes” of five oysters: Brook, Manny, Bronxy, Queeny and Stats.

Student Jane Rebecca Marchant was one among the hundreds of thousands who joined the People’s Climate March Sunday, and she took a lot of photos. You can see her photo essay on the march on the website of the Morningside Post, the student-run newspaper at the Columbia School of International and Public Affairs.

Though still requiring more research and development, direct air capture, a technology that extracts CO­2 from ambient air, offers reason for optimism. It is economically viable in several areas and can permit negative emissions to eventually stabilize atmospheric concentrations. While current support for the pioneers in this industry comes from private and philanthropic investment, here are 10 reasons why policy makers should take direct air capture seriously.