There is quite a bit of stuff on the internet... google is your friend...
Brown clouds threaten world food supply - World environment- msnbc.com
here is the first page that came up.... mind you.. i am in London, my searches will bring up different pages to you yankee type
Is your government indulging in a little chinese style internet suppression perhaps?
and some more..
"Brown Clouds" Contribute to Himalaya Glacier Melt
Asian brown cloud - Wikipedia, the free encyclopedia