Transformations on tourism trends and their impact on the environment: a case study in the province of Ávila
págs. 1-17
Sustainability and new information and comunication technologies
Alfredo Tolón Becerra , Xavier Bolivar Lastra Bravo
, José Fernando Bienvenido Bárcena, Joaquín García Sobrino
págs. 18-34
Study of the Evolution of Environmental Management in Industrial Enterprises
Marta Ormazábal, Jose María Sarriegi
págs. 35-44
Energetic alternatives to the nuclear technology
Fernando Blanco Silva, Gabriel Pereiro López, Alfonso Isidro López Díaz , Rosa María Regueiro Ferreira
págs. 45-53