The authors of this book examine the latest developments in environmental research. Chapters include nanostructured porous semiconductors as emerging materials in environmental technology; contrasting fish assemblages in free-flowing and impounded tributaries to the upper Delaware River; effects of the absence of adequate regulatory structure on the conservation of peyote; iridium as the new polluting metal linked to vehicular traffic; application of biogas for sustainable energy development from agricultural residues; combustion of oil layer on the surface of water; weathering effects on the structure and thermal behavior of bituminous coal; the use of lignite for the thermal treatment of waste-tyre on a commercial scale; cadmium uptake and distribution in tissues of sea bream with different cadmium exposure histories; mine closure aspects of balanda opencast mine of jagannath area, Mahanadi coal field; and Bogota's urban wetlands.