State of the Planet

News from the Columbia Climate School

Author: Renée Cho15


  • The Damaging Effects of Black Carbon

    The Damaging Effects of Black Carbon

    Air pollution, both outdoors and indoors, causes millions of premature deaths each year. The deaths are mainly caused by the inhalation of particulate matter, especially black carbon. But black carbon not only has impacts on human health, it also affects visibility, harms ecosystems, reduces agricultural productivity and exacerbates global warming.

  • What Five Tech Companies Are Doing About Climate Change

    What Five Tech Companies Are Doing About Climate Change

    Many experts agree that the climate pledges made at COP21 alone will not hold global temperatures below 2˚ C—we also need significant investment in energy technology innovation in order to meet the climate goals. What are the five big tech companies and their founders doing about climate change?

  • How Well is the World Protecting Ecosystems and Human Health?

    How Well is the World Protecting Ecosystems and Human Health?

    The new global environmental report card is out. The 2016 Environmental Performance Index graded 180 countries on how well they are protecting human health and their ecosystems. While the world is making progress in some areas, it is seriously falling behind in others.

  • El Niño and Global Warming—What’s the Connection?

    El Niño and Global Warming—What’s the Connection?

    The United Nations has declared 2015 the hottest year since record keeping began. It was also a year marked by the occurrence of a “super” El Niño. Are the warming temperatures and El Niño connected?

  • #100. Taking a Fresh Look at Five Issues

    #100. Taking a Fresh Look at Five Issues

    This is the 100th blog I’ve written for the State of the Planet. It seemed like a good occasion to take a look at my five most popular blogs to see what has changed in the years since they were written. Is the news better or worse for seawater greenhouses, plastic pollution, turning wastewater into…

  • Understanding the Paris Climate Accord and Its Implications

    Understanding the Paris Climate Accord and Its Implications

    On Saturday, Dec. 12, 2015, 195 countries reached a history-making agreement to reduce their greenhouse gas emissions in order to avert the direst effects of climate change. Here are some of the best and most reliable resources to help you understand the Paris accord and its implications.

  • How Sustainable is Vertical Farming? Students Try to Answer the Question

    How Sustainable is Vertical Farming? Students Try to Answer the Question

    Vertical farming is touted as a solution to the drawbacks of traditional agriculture, but how sustainable is it really? A team of students attempts to design a certification system to assess the sustainability of vertical farms.

  • Six Tough Questions About Climate Change

    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.

  • The Paris Climate Change Conference – What You Need to Know

    The Paris Climate Change Conference – What You Need to Know

    The United Nations Climate Change Conference, meeting in Paris from Nov. 30 to Dec. 11, brings together world leaders to craft a new international agreement to keep the average global temperature rise below 2°C by 2100. Here’s what you need to know about it.

  • The Damaging Effects of Black Carbon

    The Damaging Effects of Black Carbon

    Air pollution, both outdoors and indoors, causes millions of premature deaths each year. The deaths are mainly caused by the inhalation of particulate matter, especially black carbon. But black carbon not only has impacts on human health, it also affects visibility, harms ecosystems, reduces agricultural productivity and exacerbates global warming.

  • What Five Tech Companies Are Doing About Climate Change

    What Five Tech Companies Are Doing About Climate Change

    Many experts agree that the climate pledges made at COP21 alone will not hold global temperatures below 2˚ C—we also need significant investment in energy technology innovation in order to meet the climate goals. What are the five big tech companies and their founders doing about climate change?

  • How Well is the World Protecting Ecosystems and Human Health?

    How Well is the World Protecting Ecosystems and Human Health?

    The new global environmental report card is out. The 2016 Environmental Performance Index graded 180 countries on how well they are protecting human health and their ecosystems. While the world is making progress in some areas, it is seriously falling behind in others.

  • El Niño and Global Warming—What’s the Connection?

    El Niño and Global Warming—What’s the Connection?

    The United Nations has declared 2015 the hottest year since record keeping began. It was also a year marked by the occurrence of a “super” El Niño. Are the warming temperatures and El Niño connected?

  • #100. Taking a Fresh Look at Five Issues

    #100. Taking a Fresh Look at Five Issues

    This is the 100th blog I’ve written for the State of the Planet. It seemed like a good occasion to take a look at my five most popular blogs to see what has changed in the years since they were written. Is the news better or worse for seawater greenhouses, plastic pollution, turning wastewater into…

  • Understanding the Paris Climate Accord and Its Implications

    Understanding the Paris Climate Accord and Its Implications

    On Saturday, Dec. 12, 2015, 195 countries reached a history-making agreement to reduce their greenhouse gas emissions in order to avert the direst effects of climate change. Here are some of the best and most reliable resources to help you understand the Paris accord and its implications.

  • How Sustainable is Vertical Farming? Students Try to Answer the Question

    How Sustainable is Vertical Farming? Students Try to Answer the Question

    Vertical farming is touted as a solution to the drawbacks of traditional agriculture, but how sustainable is it really? A team of students attempts to design a certification system to assess the sustainability of vertical farms.

  • Six Tough Questions About Climate Change

    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.

  • The Paris Climate Change Conference – What You Need to Know

    The Paris Climate Change Conference – What You Need to Know

    The United Nations Climate Change Conference, meeting in Paris from Nov. 30 to Dec. 11, brings together world leaders to craft a new international agreement to keep the average global temperature rise below 2°C by 2100. Here’s what you need to know about it.