Data loss - The most frequent causes.

Data loss, the main causes! I recently read an article in which the author listed the main causes of data loss.
Usualy, here are the worst 'enemies' of the hard disk, which are responsible for most cases of data loss: rising tension electrical outage, fall or move on the central processing unit (PC, Mac or laptop) , delete data, whether intentional or accidental, sudden changes in temperature, dust, humidity, obsolescence or failure of the hard drive.