Green smoke typically refers to smoke that appears green in color, often due to the burning of certain materials or chemicals. This phenomenon can occur in various contexts, such as during fireworks displays or when specific dyes are used in smoke bombs. The green hue is usually a result of the combustion of compounds containing elements like copper. In some cases, green smoke can also indicate the presence of toxic substances. For example, certain industrial processes or chemical reactions may produce green smoke as a byproduct. It is essential to exercise caution and ensure proper ventilation when encountering any unusual smoke, including green smoke.