Many years ago I planted two one metre high Araucaria trees in the plot of land around our house. I love monkey puzzle type trees. The dark foliage, needle type leaves and beautiful peeling bark are attractive. One of the two trees was sickly with yellowing branches and a couple of brown dead ones. I was given a discount for this one. After planting it flourished and the two trees provide shade and are taller than a three storey block of flats. During the hottest months irrigation keeps them healthy.
Recently someone was spraying with a can and some black paint landed on the bark of one of the two trees. The response was interesting. The tree was “wounded” and reacted by releasing sap. Lesson-respect nature.