Benjamin, you talked a little bit about how stuff that's existing is more valuable than future stuff. We see that all the time. My brother is a plumber. He talks about how the older furnaces last longer and the newer furnaces last three years. We put them in the landfill and then we put in new ones. He says that yes, with the total energy cost saving over the life of that new one, you're probably paying for half of the newer, more efficient one just by the reduced energy costs, but you're replacing it every three years. The old one we were replacing once in 15 years. He says the cost-benefit analysis on that doesn't necessarily line up, just in terms of filling the landfill with these old devices that wore out, broke, or whatever the case may be.
Can you comment on that a little bit?