State of the Planet

News from the Columbia Climate School

population density

  • Density, Equity, and the History of Epidemics in New York City

    Density, Equity, and the History of Epidemics in New York City

    The city’s economic success depends on its density. But density also allows contagious diseases to spread. Looking at how the city has managed this conflict in the past could shed light on what the future holds.

  • Working with Facebook to Create Better Population Maps

    Working with Facebook to Create Better Population Maps

    Knowing how settlements are distributed across the landscape—e.g., in clusters, along roads or waterways, or scattered widely—has important implications for designing infrastructure, improving access, and promoting sustainability.

Earth Month Graphic Collage: "Our Power, Our Planet - April 2025"

The first Earth Day in 1970 ignited a movement to stop polluting our planet. This Earth Month, join us in our commitment to realizing a just and sustainable future for our planet. Visit our Earth Day website for ideas, resources, and inspiration.

  • Density, Equity, and the History of Epidemics in New York City

    Density, Equity, and the History of Epidemics in New York City

    The city’s economic success depends on its density. But density also allows contagious diseases to spread. Looking at how the city has managed this conflict in the past could shed light on what the future holds.

  • Working with Facebook to Create Better Population Maps

    Working with Facebook to Create Better Population Maps

    Knowing how settlements are distributed across the landscape—e.g., in clusters, along roads or waterways, or scattered widely—has important implications for designing infrastructure, improving access, and promoting sustainability.