blog.prepasbio.orgblog.prepasbio.org/_upa_int/documents/2013_2014/biblio...The tree trunks and other...
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blog.prepasbio.orgblog.prepasbio.org/_upa_int/documents/2013_2014/biblio...The tree trunks and other surfaces concerned are blackened in smoke-polluted areas but in unpolluted rural