What is your point? Tomatoes are grown in sunny locations and usually watered artificially. So ungrown tomatoes are unwatered tomatoes.

A better question is to wonder how we can at least visualize externalities. On the one hand it is impossibly hard, on the other it is easy to improve over the current lets not talk about them approach.

I had pondered itemized bills so that we may at least make that data available but it wouldn't be very useful compared to what it costs to gather the data. It just wouldn't fit in our attention span. The shooting from the hip approach taken by De Aanzet is good enough to expand the attention all the way up to HN and beyond.

There is no such thing as non-imaginary dollars.