radioactive ionizing radiation nuclear danger yellow on massive cracked concrete wall dark rustic grunge background

abandoned alert and atomic attention background black blueish building careful caution chemistry concrete contamination cracked danger dangerous dark derelict design dirty emission energy factory grunge hazard icon industrial ionizing life massive material nuclear old over paint plutonium pollution power precaution protection radiation radioactive radioactivity reactor risk rustic safety sign symbol texture threatening uranium wall war warning waste weathered yellow