Soil contains 1--10 ppm arsenic, while seawater has only 1.6 ppb arsenic.
Seawater has only 1.6 ppb arsenic. Soil contains 1--10 ppm of arsenic.
Soil contains 1--10 ppm of arsenic. Seawater has only 1.6 ppb arsenic.
Soil contains 1--10 ppm of arsenic. Seawater has only 1.6 ppb arsenic.