Subject	human activity
Predicate	affect
Object	ecosystem
Modality	Modality Occurrences
Polarity	POSITIVE
Plausibility	0.9652
Neighborhood Sigma	0.9831
Local Sigma	0.9714
Example Sentences	Sentence Occurrences Source human activities affect the ecosystem 4 Google Autocomplete, Answers.com Questions human activities affect ecosystems 2 Google Autocomplete, Answers.com Questions human activity affect the ecosystem 2 Answers.com Questions