On the one hand: Nice formulas. On the other hand: Glaciers are melting, even in Iceland. Keeping stuff frozen seems pretty difficult in practice. Also, one o

On the one hand: Nice formulas. On the other hand: Glaciers are melting, even in Iceland. Keeping stuff frozen seems pretty difficult in practice. Also, one of the formulas for air flow through the pile seems to assume 90 straight days of constantly freezing temperatures. I doubt there is prime agricultural land where you get that.