Icelandic water
Icelandair's inflight magazine had a big article on the water export industry in Iceland, how it might be the key to lifting the nation out of the recession. But there are also environmental concerns around that industry (less so certainly than the aluminum plants however), since the water has to be shipped either in plastic bottles for the "high end water market" as it is called, or in large bladders for use by beverage producers abroad, who want to let their consumers know that high-quality Icelandic water was used in making their product. All of this uses up a lot of resources, so there is a cost-benefit analysis going on. But the consensus seems to be that given the alternatives, and given Iceland's current situation, the water export business is the way to go. I am not a financial analyst, so I don't know about all this. There certainly seems to be enough water, so I would say it does not seem like such a bad idea. Plus it means I get to drink the best water ...