Subject	human activity
Predicate	affect
Object	soil
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.8926
Neighborhood Sigma	0.9092
Local Sigma	0.9157
Example Sentences	Sentence Occurrences Source human activity affect soil 2 Google Autocomplete human activities affect soil 1 Google Autocomplete human activities affect the soil 1 Answers.com Questions