Overall is related to Health. Health is related to Safety. 
Ecological is related to Reduce. Reduce is related to Go. Go is related to Continue. Continue is a different concept from Stop. 
Overall <--RelatedTo--> Health <--RelatedTo--> Safety 
Ecological <--RelatedTo--> Reduce <--RelatedTo--> Go <--RelatedTo--> Continue <--DistinctFrom--> Stop 