There are two qualifications I would use, particularly on the environmentalist side of things. Some witnesses, I would suggest, are better informed. They specialize in the topic. The other qualification is that they've given serious consideration to what we're talking about here.
There has been a lot of interest and consideration of the first Kyoto period; there are fewer groups that actually work on thinking about the long-term implications. I would say that's also true on the industry side. Some are more short range, but some of the industry groups, the Alcans, in the Canadian context, have been more fixated on the long range.