The obvious and main problem (and reason to keep your sewer lines clean) is because a backed-up sewer line means that sewage can get backed up into sinks and bathtubs. This is unsanitary and a health hazard. A broken sewage line is costly to repair.
the problems that happen are that people
All of the above are correct.
Children might get involve in criminal activities
Most earthquakes do occur on fault lines.
when humans interfere, it depends what they interfere with. If it is to protect a spiecies then it is good. If not no.
what problems can occur if a highway have sharp bends
what problems can occur if a highway have sharp bends
what problems can occur if a highway have sharp bends
Major ozone problems occur in stratosphere. It is where the ozone is located.
When sinking the murum soil, landslides or mudslides might as well occur.
During the sinking of the murum soil the landslides might just occur.
1. You might miss spell something 2. One might record some data incorrectly 3. One might use the incorrect vocabulary