PIA_QUIMICA
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http://bloglluviacida.blogspot.mx/2012/10/que-esla-lluvia-acida-ycuales-son-sus.html<br />
http://www.ecoclimatico.com/archives/lluvias-acidas-posiblessoluciones-99<br />
http://www.ehu.eus/cdsea/web/index.php?option=com_content&view=arti<br />
cle&id=117&Itemid=236&lang=es<br />
http://www4.tecnun.es/asignaturas/Ecologia/Hipertexto/11CAgu/110ConAg.htm<br />
https://www.inspiraction.org/cambio-climatico/contaminacion/contaminaciondel-agua<br />
http://cambioclimaticoglobal.com/que-es-el-calentamiento-global<br />
http://www.quimicaorganica.org/alcanos/61-tipos-de-hidrocarburos.html<br />
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