Universidade de Brasília - UnB Sustentabilidade em Debate Sustainability in Debate Vol. 3 N. 1 Jan - Jun 2012 In This Issue Opinion and Articles Earth as a system Science, ethics and social responsibility The Jari Project Cement production Payment for environmental services Community-based tourism Higher education and sustainability Debate Vandana Shiva Interview Jose Eli da Veiga Book Reviews Anthony N. Penna Bertha Becker Paulo Bertran