"We've been tracking the water industry for a while and it's been crystal clear that water is an area we want to dive into," says Toby Smith in his ChangeWave Investing. Here, he looks at a water-focused ETF.

"Water is often taken for granted, but that is changing. A combination of global economic growth and years of neglect are leading to a tidal wave of demand for water infrastructure and various technologies.

"It's forecasted that by 2025, almost two-thirds of the global population will live in countries where water will be a scarce commodity. Climate change could exacerbate the problem. Clearly, water issues cross all boundaries.

The water industry combines the best attributes of a good defensive strategy coupled with numerous 'offensive' plays. From a growth perspective, spending on water projects at all levels is on the upswing due to years of infrastructure neglect and under-investment.

"One great way for all investors to participate is by investing in an ETF with a water focus, such as PowerShares Water Resources (NYSE: PHO).

"The beauty of this water ETF is that it gives us exposure to each of the companies that were highest rated in our survey (comprising approximately one-third of the PHO holdings). PHO also has a well-balanced portfolio, with no single stock representing more that 4% of the total. IN our view, it's clear that the water industry will see above-average growth well into the future."

Each day, Steven Halpern's TheStockAdvisors.com offers the latest market commentary and favorite investment ideas from the nation's leading financial newsletter advisors.