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Klaus Töpfer

Klaus Töpfer

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Klaus Töpfer, former Executive Director at the United Nations Environment Programme, former Under-Secretary-General of the United Nations, and a former German environment minister, is Executive Director at the Institute for Advanced Sustainability Studies in Potsdam and Council Chair at Agora Energiewende.

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  1. The Solar Price Revolution
    Solar panel parking garage JN Stuart/Flickr

    The Solar Price Revolution

    Apr 3, 2015 Klaus Töpfer highlights the potential of falling renewable-energy costs to transform production and consumption.

  1. pisaniferry138_Constantin JohnnyGetty Images_EUmap Constantin Johnny/Getty Images

    How to Build the European Political Community

    Jean Pisani-Ferry & Daniela Schwarzer urge those attending the EU's upcoming Prague summit to establish ambitious goals and a long-term timetable.
  2. elerian152_Ian ForsythGetty Images_kwarteng Ian Forsyth/Getty Images

    A Shocking Ten Days for the UK

    Mohamed A. El-Erian

    Recent policy decisions in the United Kingdom have jeopardized the country’s economic well-being and financial stability, with the most vulnerable segments of the population facing the greatest risks. But with rapid and coordinated action, policymakers can still change course.

    explains what policymakers must do to avoid further financial and economic upheaval.
  3. Greene-Ibrahim_She-Writes

    Megan Greene and Hindou Ibrahim

    Oct 3, 2022

    Megan Greene is a senior fellow at the Mossavar-Rahmani Center for Business and Government at Harvard Kennedy School and a member of the Regenerative Crisis Response Committee.

    Hindou Ibrahim is Founder and President of the Association for Indigenous Women and Peoples of Chad and Co-Chair of the International Indigenous Peoples Forum on Climate Change.

  4. roubini167_Michael M. SantiagoGetty Images_stock market falling Michael M. Santiago/Getty Images

    The Stagflationary Debt Crisis Is Here

    Nouriel Roubini

    The Great Moderation has given way to the Great Stagflation, which will be characterized by instability and a confluence of slow-motion negative supply shocks. US and global equities are already back in a bear market, and the scale of the crisis that awaits has not even been fully priced in yet.

    sees the latest market turmoil as a long-anticipated reckoning for bad policies and negative supply shocks.
  5. fischer197_SERGEI SUPINSKYAFP via Getty Images_russiaukrainewar Sergei Supinsky/AFP via Getty Images

    The Cold War Is Back

    Joschka Fischer explains what the new Russian military and nuclear threat means for the European Union.
  6. johnson154_Danish DefenceAnadolu Agency via Getty Images)_nordstreamattack Danish Defence/Anadolu Agency via Getty Images

    Putin Escalates, Europe Hesitates

    Simon Johnson urges European leaders to take three steps to counter Russia's illegal annexation of Ukrainian territory.
  7. Investing-In-Health-For-All_Thumbnail_FinalPlay

    PS Events: Investing in Health for All

    PS editors present the Investing in Health for All event.
  8. sinn106_DANIEL ROLANDPOOLAFP via Getty Images_ecb lagarde DANIEL ROLAND/POOL/AFP via Getty Images

    The ECB Has Been Driving EU Inflation

    Hans-Werner Sinn explains how the European Central Bank has contributed to soaring prices, including for energy.
  9. teixeira1_ LUIS ROBAYOAFP via Getty Images_bolsonaroclimatechange Luis Robayo/AFP via Getty Images

    The Populist Climate Threat

    Izabella Teixeira, et al. warn that right-wing nationalists and other political opportunists could normalize inaction.

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