Sorry is related to Minute. Minute is the opposite of Significant. Significant is related to Meaningful. Meaningful is a synonym of Massive. 
you are likely to find Pollution in/at/on Outside. Outside is related to Nature. Nature is related to Scientific. 
Sorry <--RelatedTo--> Minute <--Antonym--> Significant <--RelatedTo--> Meaningful <--Synonym--> Massive 
Pollution --AtLocation--> Outside <--RelatedTo--> Nature <--RelatedTo--> Scientific 