Matched context for concern and contamination

The page lists matched contexts for concern and contamination.

Share - concern	Share - contamination	Phrase
24.13%	2.54%	environmental [natural phenomenon] {concern or contamination}
1.30%	2.44%	reduce {concern or contamination} [perform operation]
1.12%	1.00%	{concern or contamination} [does] require
0.82%	0.54%	not {concern or contamination}