| US Dustbowl #1 (1933) US Dustbowl #2 (1950) *East Africa (1967) West Africa (1970s+) Alaska (1970s+) China/Korea (1997) Canada (1999) |
US Dustbowl #3 (1999) US Southeast (1999) Brazil/Amazon (1998) Australia (2001) New Horizon (2010) Russia (2010) |