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 In three hundred years mankind is consuming the fossil fuel energy that took nature three billion years to produce.

Magnetic pressure

Magnetic pressure is an energy density associated with the magnetic field.

Interplay between magnetic pressure and ordinary gas pressure is important to both the fields of magnetohydrodynamics and plasma physics. Any magnetic field has an associated pressure that is contained by the boundary conditions on the field, and a gradient in field strength causes a force due to the magnetic pressure gradient; this force is called the magnetic pressure force.