The media is full of apocalyptic news of fires in the “lungs” of the world and discussion of the bleak future we face if this unprecedented crisis is not tackled. The Pope, governments and celebrities have all added their voices to the anxiety over what this means for the planet.

Despite the pictures posted by the seers and sages of Hollywood, the fires in the Amazon are not visible from the air as swathes of blazing trees. They are more insidious: they are fires at the level of the forest floor which can damage trees with thin bark and therefore kill them, without the canopy of the forest ever visibly burning.