Preus internacionals dels productes agraris i canvis en el sistema alimentari mundial Authors Jordi Rosell i Foxà Lourdes Viladomiu i Canela Abstract The article aims to highlight the main reasons for recent price rises in raw agricultural produce. It also deals with the changes and challenges of the global food system pointing out the involvement of biofuels in this process and discussing the role of agricultural policies. Downloads Download data is not yet available. Downloads Text complet (Català) Published 2012-09-04 Issue No. 32: juny 2012 Section Articles License The intellectual property of articles belongs to the respective authors. On submitting articles for publication to the journal QUADERNS AGRARIS, authors accept the following terms: Authors assign to ICEA (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles submitted for publication to QUADERNS AGRARIS.Authors answer to ICEA for the authorship and originality of submitted articles.Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles.ICEA declines all liability for the possible infringement of intellectual property rights by authors.The contents published in the journal, unless otherwise stated in the text or in the graphic material, are subject to a Creative Commons Attribution-NonCommercial-NoDerivs (by-nc-nd) 3.0 Spain licence, the complete text of which may be found at http://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Consequently, the general public is authorised to reproduce, distribute and communicate the work, provided that its authorship and the body publishing it are acknowledged, and that no commercial use and no derivative works are made of it.The journal QUADERNS AGRARIS is not responsible for the ideas and opinions expressed by the authors of the published articles.