248338document87400unep_252_global_resource_outlook_2019_web.pdfapplication/pdf8c8f36888658fd470a18a6a4036ee6fbMD5138335772019-04-26 10:31:39https://pure.iiasa.ac.at/id/eprint/15879/1/unep_252_global_resource_outlook_2019_web.pdf