Arsenic that is naturally occurring can contaminate the soil, just as it does the groundwater. This presents a possible arsenic exposure for people who smoke products containing tobacco, because the tobacco plant grows from the soil and can become infiltrated with the arsenic.
Naturally occurring arsenic can contaminate both the soil and groundwater. People who consume tobacco products might be exposed to arsenic due to the tobacco plants absorbing the arsenic from the contaminated soil they grow in.