IDEAS home Printed from
   My bibliography  Save this article

Climate Protection!: A New Energy Policy?


  • Ottmar Edenhofer
  • Kai Lessmann
  • Nico Bauer
  • Hermann Held


There is an emerging planetary consensus: Climate protection is necessary. Preventing global mean temperature from rising more than 2°C above pre-industrial levels is a common goal of climate protection. In essence, it requires a stabilization of carbon dioxide emissions within the next two decades in order to approach nearly zero emissions at the end of the century. Based on an integrated assessment model, we show that climate protection implies an increasing energy efficiency, a share of 20% of renewable energy at the mid of the century, and the use of carbon capturing and sequestration (CCS) on emissions from point sources. The costs of such a scenario are estimated to be about 1.0% of the gross world product, with a strong dependency on the leakage rate of CCS and the learning rates of the renewables. Es scheint sich ein planetarischer Konsens zu bilden: Klimaschutz ist notwendig. Es ist allgemein anerkannt, dass die globale Mitteltemperatur das vorindustrielle Niveau um nicht mehr als 2°C steigen sollte, wenn gefährliche Störungen des Klimasystems vermieden werden sollen. Dies setzt im Wesentlichen eine Stabilisierung der CO2-Emissionen in den nächsten beiden Dekaden voraus; zum Ende des Jahrhunderts sollten sich diese dann der Nulllinie nähern. Anhand eines Integrated-Assessment-Modells wird gezeigt, dass zur Erreichung dieses Klimaschutzzieles die Energieeffizienz mittelfristig erhöht werden muss, der Anteil erneuerbarer Energien bis zur Mitte des Jahrhunderts auf 20 % steigen sollte und die CO2-Emissionen an großen Punktquellen eingefangen und schließlich in geologischen Formationen gelagert werden müssen (sog. Carbon Capturing and Sequestration). Die Kosten der Umsetzung betragen dabei etwa 1 % des weltweiten Bruttosozialprodukts. Die Höhe der Vermeidungskosten hängt entscheidend von der Rate ab, mit der CO2 aus geologischen Formationen entweicht, sowie von der Lernrate der erneuerbaren Energieträger. Als hierzu notwendige Instrumente werden handelbare Emissionsrechte, grüne Energiezertifikate und "carbon sequestration bonds" diskutiert.

Suggested Citation

  • Ottmar Edenhofer & Kai Lessmann & Nico Bauer & Hermann Held, 2005. "Climate Protection!: A New Energy Policy?," Vierteljahrshefte zur Wirtschaftsforschung / Quarterly Journal of Economic Research, DIW Berlin, German Institute for Economic Research, vol. 74(2), pages 137-147.
  • Handle: RePEc:diw:diwvjh:74-2-2
    DOI: 10.3790/vjh.74.2.137

    Download full text from publisher

    File URL:
    Download Restriction: no

    More about this item


    Access and download statistics


    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:diw:diwvjh:74-2-2. See general information about how to correct material in RePEc.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: (Bibliothek). General contact details of provider: .

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service hosted by the Research Division of the Federal Reserve Bank of St. Louis . RePEc uses bibliographic data supplied by the respective publishers.