Fig. 2From: Arsenic cycling in the Earth’s crust and hydrosphere: interaction between naturally occurring arsenic and human activitiesWorld arsenic contamination map. This figure was produced based on the following reports and those in the text: Smedley and Kinniburgh (2002); Acharyya et al. (2005); An et al. (1997); Blanes et al. (2011); Camm et al. (2004); Gutiérrez-Caminero et al. (2015); Razo et al. (2004)Back to article page