abstract black bones corpse danger darkness dead death deceased eerie eye sockets face fear fright frightening frightful halloween haunted head hiding horror human pirates Remains scary shadows skeleton skull sleep of death smoke spooky weird white witchcraft active assistance emergency emergency services equipment fire fire and rescue fire brigade fire fighters fire fighting firemen help hoses hosing house fire protection protective protective clothing pumping pumps red spraying suburban trucks uniforms vehicles water alert appropriate-behavior appropriate-behaviour area attention banned blue boundaries boundary cigarettes communicating communication direction directive distance distinctive entrance environment health health-risk limits location no-smoking not-allowed not-permitted painted permission-denied pollution prohibited prohibition shopping-center shopping-centre sign symbol unhealthy warning wording words air breathe chimney climate cloud dioxide dirty ecological ecologically ecology emissions exhaust fuel fumes gas global harmful industrial industry intoxication noxious ozone pipe poison poisoning power precipitation smog snow steam substance toxic trees warming winter abuse addict addicted addiction addictive ailment bad barrel cancer cancerous cannon carcinogen caution concept conceptual dangerous deadly disease drug fatal free habit image isolate isolated isolation lethal medical nicotine object photo photograph picture poisonous resource smoker stock tobacco vice weapon