<?xml version="1.0" encoding="utf-8"?><mads xmlns="http://www.loc.gov/mads/" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.loc.gov/mads/
	mads.xsd"><authority><topic authority="http://www.serbi.ula.ve/tematres/vocab/">QUIMICA AMBIENTAL</topic></authority><related type="narrower"><topic>CONTAMINACION DEL AGUA</topic></related><related type="narrower"><topic>CONTAMINACION DEL AIRE</topic></related><related type="narrower"><topic>GEOQUIMICA AMBIENTAL</topic></related><related type="broader"><topic>ECOLOGIA</topic></related><related type="broader"><topic>QUIMICA</topic></related><variant type="other"><topic>Química del medio ambiente</topic></variant> <note xml:lang="es">Úsese para obras sobre los cambios químicos en el ambiente que ocurren naturalmente o que se deben a los agentes contaminadores </note></mads>