| Description: |
Until last year, Highway Patrol officials had never closed I-40, but they have shut down the east-west artery 10 times this spring. The full picture of what's causing the dust storms remains a mystery. There have been more frequent days of winds upward of 45 mph, but state and weather officials say that doesn't explain why it is kicking up so much grit. [Source: The Arizona Republic]
|
 |
