Enough to write a paper about each topic.
Climate Change and Dust Bowls, from TODAY'S PAPER
Complete coverage at NYTimes of Credit Crisis
A One Year Anniversary Report on the Bank Crisis from NYTimes
ABC News: Dust Bowl and Katrina
Teaching Tolerance Lesson Plan
NPR Katrina and Dust Bowl
NPR WHT and Dust Bowl
NYTimes on comparing the exodus
New Dust Bowl in AZ? Washington Post, also
New Dust Bowl in South Dakota? Big Time Drought.
From GW Bush's Katrina Speech:
In the life of this nation, we have often been reminded that nature is an awesome force and that all life is fragile. We're the heirs of men and women who lived through those first terrible winters at Jamestown and Plymouth, who rebuilt Chicago after a great fire and San Francisco after a great earthquake, who reclaimed the prairie from the dust bowl of the 1930's. Every time, the people of this land have come back from fire, flood and storm to build anew, and to build better than what we had before. Americans have never left our destiny to the whims of nature and we will not start now.
Pine Beetle & Grasshopper plague
Amazon.com search inside feature
Katrina on Wikipedia
Dust Bowl on Wikipedia
Don't use Wikipedia for academic research?
Whole entry here.