Plant sensors

As Martin and I were walking, I was struck again by the idea that we are surrounded by sensors in the form of plants. Even in the heart of a city, there are plants that we share the urban environment with which cannot move and so are experts of their location, expressing so eloquently the particulars of exactly where they are, culminating ‘data’ about weather, light conditions, rainfall, the chemical and fungal contents of the soil and air. So much more sophisticated than any sensor we could create. Pity we can’t digitise them - or can we?