And again, you would agree also, because of the ability to actually reduce heating costs by means of the shade the trees provide.
This is again to Mr. Keith, and I appreciate the comments about 100 years and talking about the stability of this technology over that period of time. I haven't heard a lot of discussion about the much longer time horizon—I mean 500 years or 1,000 years.
Obviously, there are deep concerns that at some point this could find ways of releasing itself into the atmosphere. What are the longer-term risks, beyond, say, the 100 years we've looked at, where the technology may be able to hold up? Where are we 500 or 1,000 years out from now in the sense that that carbon is still being stored and not finding ways to release itself into the atmosphere?