The internet relies on vulnerable undersea cables — but the biggest risks aren't the ones you think

• Undersea cables face more risk from anchors and fishing than espionage or sabotage.
• Man-made damage accounts for more than two-thirds of cable faults.
• Natural hazards also highlight the vulnerability of these networks, The Guardian reported.

The biggest threat to the undersea cables that power the internet —and, by extension, the world — may not be what you'd expect.

While espionage and sabotage are growing threats, less dramatic but more frequent factors are causing the biggest problems.