A plant for drying objects which release volatile substances may include: a drying tunnel; a conveying system configured to convey the objects through the drying tunnel; a plurality of sensors arranged along the drying tunnel; and/or a plurality of air exchange units. The sensors may be configured to measure a concentration of the volatile substances along the drying tunnel. The air exchange units may be controlled by the sensors to keep the concentration of the volatile substances in the drying tunnel below a pre-established value. A method for keeping volatile substances below a pre-established value within a plant for drying objects may include: measuring with sensors concentration of the volatile substances at points along the drying tunnel; and/or operating air exchange units, according to the concentration of the volatile substances measured by the sensors, to keep the concentration of the volatile substances in the drying tunnel below the pre-established value.