The Dust Bowl days . The Dust Bowl lasted for 8 years , causing millions to leave their homes . An estimated 20 million hectares of farmland were ineffective annually . Comment: 4 billion fewer bushels of corn will be produced this year than once expected .
The Dust Bowl lasted for 8 years , causing millions to leave their homes . An estimated 20 million hectares of farmland were ineffective annually . Comment: 4 billion fewer bushels of corn will be produced this year than once expected .