During which processes are toxic materials typically released into the air?

The scenario described pertains to the processes where toxic materials can be commonly released into the air, particularly during demolition and reconstruction activities.

During demolition, existing structures are often taken down, which can disturb materials that contain hazardous substances, such as asbestos, lead-based paints, and other harmful particles. This disturbance generates dust and debris that can release these toxins into the surrounding environment, posing health risks to workers and occupants in the vicinity.

Reconstruction also holds potential for releasing toxic materials. As new materials are introduced and old materials are remodeled or removed, the process can stir up chemicals that have adhered to surfaces over time, as well as release gases from new construction materials, like formaldehyde from certain types of insulation and adhesives.

While construction and renovation can similarly involve the presence of toxic materials, the specific focus on demolition carries a higher risk due to the aggressive nature of tearing down structures and the likelihood of encountering contained hazardous substances. Installation and setup, as well as cleaning and maintenance, generally involve fewer risks of releasing toxic materials compared to the significant disruptions caused during demolition and reconstruction.