Do I?

have the biggest eyes in the universe, or do random foreign particles (dust, debris, etc.) blow into every one's eyes at least 10 times a day?  Why the world so dusty?  Someone should do a composition analysis of the random shit that lines the streets and so often blows through the wind and into my eyes, to figure out what it's made of.  I assume there is quite a bit contributing to the cause in one way shape or form.  To make the results easier to understand and interpret, they should make a pie chart.  I'll get us started with some likely offenders that will be pre-filled in your spreadsheets:   

dead sperm tails

dead sperm heads

various dead cells from the various parts of various animals

dust from old dead cells

pavement

cement

leather fragments

tiny shards of glass

pollen

baby rocks

shards of rubber from tires that drove over dead animals

dirt

grass

drugs

Whatever, isn't everything made out of carbon anyway? 

This was an exercise.