Abstract: A device and a process for producing effects of waterfall, rain, garden, mountains, desert, animals, kitchen and river scenes while viewing a picture, an advertisement or playing amusement games in a cinema hall/open theater/TV is disclosed. The device includes a movie film/video tape/disc with coded signals for producing effects of waterfall, rain, garden, mountain, desert, animals, kitchen and river scenes or advertisements either recorded separately or embedded on the sound signals; an electronic decoder for decoding the coded signals when the film is moving and particular scene appears; the output of the electronic decoder is connected to an actuating device that releases gas/perfumes or energizes a heating/cooling device to produce the desired effects corresponding to the scene appearing on the screen.

Abstract: Process and device are provided for controlling air pollution. The apparatus includes electrochemical, electrothermal and humidity sensors which sense the presence of selected polluting gases and activate an electronic circuitry which controls the release of oxygen, fresh air, or perfumed air and thereby dilutes the concentration of polluting gases within a selected space.