Why water? It's not lost, it's endlessly renewable, specially since it's mostly just evaporated. Energy or carbon released is much more interesting. Do they m

Why water? It's not lost, it's endlessly renewable, specially since it's mostly just evaporated. Energy or carbon released is much more interesting. Do they mean evaporated? That's 2.45 kJ per gram starting at 20C or 1.2MJ per half liter water bottle or around, roughly 340 Wh per email. So, at an average price of let's say, a dollar per kWh, that's 34 cents of energy spent on the response. Something is off in the cost (unless I messed up in the math which is likely).