Disclosed is an environmental control apparatus for controlling a working environment in an exposure apparatus for effecting exposure using exposure light having a wavelength range in which oxygen absorbs the exposure light. The sending and recording device are remotely connected using a data network. A first graphics controller renders a first subset of pixels of a display to a local memory of the first graphics controller. A voltage applied across the coil varies in magnitude andor direction to cancel or weaken an MRI-related magnetic field.