"When you look at the industries, and the companies that make up the industries, you're dealing with things in alternative, clean, renewable and sustainable energy that are of substance, that have markets that far exceed any other market in the world -- and these are actual operating companies, " he says.

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China now manufactures more solar cells than any nation in the world, and recently surpassed the United States as the largest market for wind turbines in 2009.

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Germany is the traditional home of Eiswein but producers in Canada, such as Inniskillin, Jackson-Triggs and Mission Hill, have created an important export market and the country now makes more ice-wine than any other nation in the world.

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In any case, institutions the world over tend to invest most of their portfolios in the familiar home market.

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Billionaire casino moguls like Trump and Steve Wynn have not publicly shown any interest in online gambling until this year, leaving the U.S. online gambling market, the biggest in the world, for offshore companies that operated U.S. facing web sites despite the fact that the Justice Department said all forms of online gambling were illegal, which has been a hotly contested issue.

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And while the company is now the second-largest company in the world by market cap, it nonetheless looks statistically cheap by any standard metric.

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In any event Mowbray-d'Arbela's plan is to market her filter around the world and eventually reach the point where Americans are demanding the product.

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When the IPO was the largest in market cap in the history of probably the world, it had more day one trading volume than any other IPO in history.

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