http://psep.cce.cornell.edu/facts-slides-self/facts/gen-pubre-water.aspx
It explains the processes of groundwater, as its occurrence, its role on the water cycle, how pollution and depletion may occur, and it points out the need for preventing groundwater contamination.
Originador(es): Cornell University. Pesticide Management Education Program - PMEP. Pesticide Safety Education Program - PSEP
Recurso adicionado em:
27/07/1999
Idiomas disponíveis:
Inglês