El color amarronado de ciertas masas de agua podría ser normal y natural

http://www.amazings.com/ciencia/noticias/311207e.html

En los últimos 20 años, lagos y arroyos en lugares remotos del Reino Unido, el sur de Escandinava y el este de América del Norte han ido adoptando paulatinamente un color amarronado debido a la materia orgánica disuelta.

Un equipo internacional, dirigido por investigadores del University College de Londres y la Agencia para la Protección del Medio Ambiente (EPA) de EE.UU., sugiere que el cambio del color podría indicar un retorno a un estado preindustrial, más natural, por disminución de los niveles de lluvia ácida. [...]

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