Clean breathable air is something that many groups are promoting. Air free of radioactive elements is critical to maintaining clean air. Terrorist activity, smoke from fires in facilities using nuclear materials, radioactive effluent from manufacturing or nuclear and coal-fired plants, naturally occurring radiation in the form of radon and radium, all contribute to radiation in the air. US Nuclear Corp’s divisions of Technical Associates and Overhoff Technology provide a diverse suite of installed and portable radiation detection instruments for both environmental; outdoor and indoor air quality.