Regarding the mosquitos - you may not be far off the mark...I am in Manitoba and in the 1970s they used to spray malathion over the city of Winnipeg with an aircraft. They now, cleverly, spray during the middle of the night with trucks going down the street. There are some little riots and protests over this, but they keep on doing it. It is true that Winnipeg seems to be the centre for multiple sclerosis. In an attempt to figure it out, some people have proposed that it is not REALLY M.S., it is a bacterial/fungal (?) disease "caused" by falling from Canada geese flying overhead in large numbers during migration. I mean, really!