State of the Planet

News from the Columbia Climate School

environmental law3

  • Giving new meaning to the word “hybrid”

    Last week, we learned that the Obama EPA will conclude that carbon dioxide is an air pollutant as defined by the Clean Air Act (CAA).  But a so-called endangerment finding on CO2 won’t lead to comprehensive CAA regulation, as I argued a few posts ago. Rather, the Obama administration will use the CAA as a…

  • Emissions standards to get Californicated

    Less than a week into his presidency, Barack Obama is poised to take his first step on the long road to averting climate catastrophe. The Times reports that Obama will allow California to raise automobile emissions standards for greenhouse gases above the national level. (OK, technically Obama has only ordered the EPA to review California’s…

  • Around the world: Canada, Part II

    First off,  I apologize for the inexcusably long time between posts.  From now on I hope to post at least once a week (still not good enough, I know).  This is Part II of our look at the climate change reduction efforts (or lack thereof) of Canada, our fascinating yet sometimes forgotten neighbor to the…

  • Around the world: Canada, Part 1

    Periodically I’ll be taking a look at how countries other than the Big Four are faring in the fight against severe global warming, as commentators tend to focus on the United States, China, India and the European Union. This is the first in a two-part post on Canada. Oh, Canada! Our enlightened neighbor to the…

  • Climate change law comes to Columbia

    Climate change is coming to the legal profession in a big way. And law schools are starting to notice, with Columbia Law School announcing today that it has hired environmental lawyer Michael Gerrard to head a new Center for Climate Change Law.

Photo of the Earth from space with the text "Lamont at AGU25" on top.

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

  • Giving new meaning to the word “hybrid”

    Last week, we learned that the Obama EPA will conclude that carbon dioxide is an air pollutant as defined by the Clean Air Act (CAA).  But a so-called endangerment finding on CO2 won’t lead to comprehensive CAA regulation, as I argued a few posts ago. Rather, the Obama administration will use the CAA as a…

  • Emissions standards to get Californicated

    Less than a week into his presidency, Barack Obama is poised to take his first step on the long road to averting climate catastrophe. The Times reports that Obama will allow California to raise automobile emissions standards for greenhouse gases above the national level. (OK, technically Obama has only ordered the EPA to review California’s…

  • Around the world: Canada, Part II

    First off,  I apologize for the inexcusably long time between posts.  From now on I hope to post at least once a week (still not good enough, I know).  This is Part II of our look at the climate change reduction efforts (or lack thereof) of Canada, our fascinating yet sometimes forgotten neighbor to the…

  • Around the world: Canada, Part 1

    Periodically I’ll be taking a look at how countries other than the Big Four are faring in the fight against severe global warming, as commentators tend to focus on the United States, China, India and the European Union. This is the first in a two-part post on Canada. Oh, Canada! Our enlightened neighbor to the…

  • Climate change law comes to Columbia

    Climate change is coming to the legal profession in a big way. And law schools are starting to notice, with Columbia Law School announcing today that it has hired environmental lawyer Michael Gerrard to head a new Center for Climate Change Law.