the grade 6 students here are doing environmental projects in science. One group was looking at how much water went into the production of a single latte (230 liters). I asked aloud, knowing the answer about a burger, or a T-shirt (both well over 2000). The are not quite there in understanding orders of magnitude but this brings it home when they thought of the stack of 2-liter water bottles beside a latte or a burger. Ricky, you are my number one writer on Medium. keep up the volume.