RESUMEN • Existe un consenso generalizado en cuanto a los beneficios pedagógicos que el aprendizaje basado en proyectos (ABP) puede producir entre el alumnado; por ello dicha metodología se presenta como susceptible de ser utilizada como herramienta para generar una mejora de la conciencia ambiental de los estudiantes de Secundaria. La presente experiencia tiene como objetivo principal analizar la efectividad del ABP en este sentido. Para ello, se diseñó e implementó un proyecto ambiental para 4.º de Educación Secundaria Obligatoria y se aplicó un pretest y un postest para analizar la evolución de la conciencia ambiental del alumnado tras la aplicación del proyecto. Dicho proyecto se desarrolló de forma adecuada, se generaron productos finales satisfactorios y se observó una mejora en los niveles de conciencia ambiental del alumnado tras su finalización. PALABRAS CLAVE: Aprendizaje basado en proyectos; Aprendizaje cooperativo; Educación ambiental; Conciencia ambiental; Educación Secundaria. ABSTRACT • There is general consensus regarding the pedagogical benefits that project-based learning (or PBL) may produce among students; that is why this methodology is presented as a suitable tool to make improvement on environmental awareness among high school students. The main objective of this experience is hence to analyze the effectiveness of PBL. To this end, an environmental project for the fourth course of compulsory Secondary Education was designed and implemented, and a pretest and a post-test were later applied so as to analyze the evolution of the environmental awareness among students after the application of the project. The project was developed in an appropriate way and good outcomes were produced; moreover, there was a notable improvement in the levels of environmental awareness after the study was completed.

A single point study of atmospheric pollution has been carried out in Granada (Spain); suspended particulate matter, sulphur oxides, ammoniac, nitrogen dioxide and polycyclic aromatic hydrocarbons were determined. There were variations in relation to the month and the day of the week. The PAHs have been determined through HPLC, with a mobile phase of acetonitrile-water (75-25). The results of measurements of benzo(a)pyrene were between 1.006 and 0.485 micrograms m-3 in two different periods of sampling.

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