Although consumers are becoming increasingly conscious of taking care of the environment, there are not many options for investors to invest in alternative-energy and environmental technologies, according to BusinessWeek.Capitalizing on the shortage, Wall Street is creating new exchange-traded funds that provide investors with exposure to alternative energy companies in a straightforward, cost-effective way, yet without the risk of putting all their investments in one basket.

As of this year, there are at least five ETFs focused on alternative energy and a slew of new indexes that let investors track the performance of the industry as a whole, as well as sub-segments like energy generation.

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