State of the Planet

News from the Columbia Climate School

stratospheric aerosol injection

  • How Hard Is It to Dim the Sun?

    How Hard Is It to Dim the Sun?

    Solar radiation management is gaining traction as a climate intervention—but new research warns that real-world constraints make it riskier and more uncertain than most models suggest.

Columbia Climate School Giving Day on October 28, 2026, featuring students and renewable energy imagery

October 28, 2026 is Columbia Giving Day! Your gift to Columbia Climate School helps advance interdisciplinary research, educate the next generation of leaders, and transform bold ideas into real-world solutions for climate, Earth, and society.

  • How Hard Is It to Dim the Sun?

    How Hard Is It to Dim the Sun?

    Solar radiation management is gaining traction as a climate intervention—but new research warns that real-world constraints make it riskier and more uncertain than most models suggest.