Who on earth am I?

sprigs of green emerging from some sort of 3D web

Breath.   Oxygen in.   Carbon dioxide out.   Chlorophyll captures the sun.   Rice grows in faraway hills.   People harvest it, thresh it, sell.   Wind drives a turbine; wires carry energy.   Water piped here from Wales boils spinach and rice.   Food enters the tube my body is built around.   … Read more