(→Roads) |
|||
Line 17: | Line 17: | ||
Near roads in Germany, with a heavy traffic of about 16,000 car a days and with a speed limit of 80km/h, platinum concentrations have been estmiated around '''50µg/kg'''. Concentrations in soils town center have even shown a value of '''90µg/kg'''!<ref>http://www.sciencedirect.com/science/article/pii/S0048969707007905 Wichmann and al., 2007<ref> | Near roads in Germany, with a heavy traffic of about 16,000 car a days and with a speed limit of 80km/h, platinum concentrations have been estmiated around '''50µg/kg'''. Concentrations in soils town center have even shown a value of '''90µg/kg'''!<ref>http://www.sciencedirect.com/science/article/pii/S0048969707007905 Wichmann and al., 2007<ref> | ||
− | Even greater value have been found, reaching the impressive value of '''132µg/kg'''<ref> | + | Even greater value have been found, reaching the impressive value of '''132µg/kg'''<ref>http://pubs.acs.org/doi/abs/10.1021/es061453s Zereini and al., 2007</ref>. |