Pollen - Basically hayfever.
Animal fur - Same symptoms as hayfever.
Dust - Same as above.
I think I have something called Oral Allergy Syndrome. It's an allergy to raw fruit, vegetables, nuts, spices, etc. It mainly occurs with people who have hayfever. So far, I know raw apples, apriciots, peaches, and maybe pears cause it. I'm OK when it's cooked but when raw, my throat swells up and lasts for about an hour or two.
http://www.calgaryallergy.ca/Articles/English/Oral_Food_Allergy.htm