There are quite a few problems with storing data
1) security issues
2) excessive data
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You might receive anonymous results (incorrect data). By using Automated weather equipment, the results will be more accurate.
1. You might miss spell something 2. One might record some data incorrectly 3. One might use the incorrect vocabulary
a data can be inncorrect if the user is impatient.
Duplication of data is data redundancy. It leads to the problems like wastage of space and data inconsistency.
Data warehouse is a house where current as well as historical data can be stored.