If you notice trees looking greener near a volcano, it's a good idea to get out of there. The extra green is because volcanic activity is ramping up, releasing more carbon dioxide which plants love. But once the volcano really gets going, those plants turn brown because of the harmful sulphur dioxide and intense heat. So, greener trees can be an early warning sign that the volcano might wake up soon. Basically, if the greenery starts to pop, it might be time to drop!

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