Ключевые слова: background, barrel, biohazard, black, blue, canister, caution, chemical, chemistry, container, contamination, crude, danger, drum, ecology, energy, environment, environmental, fuel, gallon, gas, gasoline, hazard, industrial, industry, isolated, manufacturing, material, metal, nuclear, object, oil, petrol, petroleum, pollution, radioactive, rust, rusty, safety, steel, storage, substance, tank, toxic, warning, waste, white, yellow,