Autor: Luiz Drude de Lacerda

Protection of the environment has nowadays become a major challenge and a condi- tion for survival of future human generations and life on Earth in general. Yet it is still far too much of a dream or …

Three symposia on environmental geochemistry in tropical countries, held in Niter6i, Brazil (1993), in Cartagena, Colombia (1996) and in Nova Friburgo, Brazil (1999), made it very clear that tropical …