The main reason to clear a space-your home, your car or your office-is to remove negative energies. Negative energies occur for a number of reasons. They include:
Metaphysical
Negative thoughts from current or previous owners or occupants
Disturbed emotional energy of current or previous owners or occupants
Disturbed environmental energy
Dimensional beings
Earth Energies
Faulting pressure (Faults are breaks in the Earth's crust where chunks of land on each side move in different directions. Land suddenly shifting along fault lines is the primary cause of earthquakes.)
Negative magnetic fields
Disturbances from naturally occurring underground water