But the fleets are also therebecause fish stocks in more temperate waters have been badly overfished -- andnot necessarily just because of climate change.

Bouquinistes' sales have dived as their carefully collected stocks of rare and out-of-print books face competition from online dealers and a change in Parisians' reading and shopping habits.

That makes solar a leveraged sector in which a relatively small change in U.S. policy could make a huge difference to individual stocks.