 Decoherence is clearly neither a dynamical evolution contradicting the Schrödinger equation, nor a new supplementation or interpretation of the theory. As we shall discuss, however, it both reveals important dynamical effects within the Schrödinger evolution, and may be suggestive of possible interpretational moves. As such it has much to offer to the philosophy of quantum mechanics. At first, however, it seems that discussion of environmental interactions should actually exacerbate the existing problems. Intuitively, if the environment is carrying out lots of spontaneous measurements even without our intervention, then the measurement problem ought to apply more widely, also to these spontaneously occurring measurements.