The forests here in northern Az are being chipped with chippers that would eat.
Pine needle mulch is an organic material that is readily available at garden centers and nurseries. Like any mulch, pine needles provide protection for roots and help preserve moisture in the soil. I have done that and it makes a very good mulch.
Some people still believe a long time myth that wood from pine trees will make soil acidic, but it is not the trees that make the soil acidic.