Present development styles and environmental problems / Mostafd K. Tolba. -- The interaction between styles of development and the environment in Latin America / Osvaldo Sunkel. -- Comments on the article “The Interaction between Styles of Development and the Environment in Latin America” / Comments by Aníbal Pinto / Comments by Jorge Sàbato / Comments by Gabriel Valdés / Comments by Jorge Wilheim. -- Biosphere and development / Raúl Prebisch. -- The environment in the political arena / Marshall Wolfe. -- Development strategies with moderate energy requirements Problems and approaches / Ignacy Sachs. -- Development and environment: the Brazilian case / Fernando H. Cardoso. -- The environmental dimension in agricultural development in Latin America / Nicolo Gligo. -- Environmental factor, crisis in the centres and change in international relations of the peripheral countries / Luciano Tomassini. -- Comments on Peripheral Capitalism and its Transformation Comments by Lucio Geller / Comments by José Ibarra / Comments by Pedro Vuskovic.