The fires in the US have released toxic substances

To say the North American sky is leaden these days may not be a figure of speech. The west coast of the USA is burning, while the east coast – even thousands of kilometers away – is faced with a smoke screen that is caused by the flames and which also obscures the sun. As a new study by the California Air Resources Board (Carb) explains. , fumes from fires can significantly increase the amount of toxic metals in the air and generate plumes that can travel long distances.