A section of the USGS map of soil lead levels (Credit: USGS)
Officials at the agency say specialists in agriculture and food safety will find the maps useful in understanding soil composition. This is because soil is the source of most elements that reach humans through the food chain.
In addition, regulators can use the maps to identify soil contamination and assess risks to human health. Accompanying the maps are data sets that can be used to start future research into related subjects.
Image: A section of the USGS map of soil lead levels (Credit: USGS)