Fact 1: Eating food that contains pesticides can have a negative impact on humans.

Fact 2: Herbicides are the leading type of pesticides, in terms of both user expenditure and volumes used.

Given the two facts above, answer the question "what can have a negative impact on humans if contained in food they eat?" with the following options: 
- h2o
 - vitamins
 - toxins
 - bacteria
 - protein
 - contamination
 - Smoking
 - herbicide


 

        herbicide 