NEW YORK (TheStreet) - Warren Buffett's recent exposure to the wind energy industry has taken center stage and stolen headlines. Using ETFs, investors can follow Buffett's lead and gain exposure to companies which work to harness and profit from the power of wind.

Energy is not a new venture for Buffett. On the contrary, through a number of his investments and subsidiaries, Warren Buffett has expanded his investment reach into various corners of the energy industry. Boasting exposure to companies including

Exxon Mobil

(XOM) - Get Report



(COP) - Get Report

and Burlington Northern Santa Fe Railroad, the famous investor has for years held direct and indirect exposure to various traditional fuel sources, including oil and coal.

The alternative energy industry is not excluded from Buffett's portfolio, either. Well known components of the Buffett's

Berkshire Hathaway

(BRK.A) - Get Report

portfolio, including

General Electric

(GE) - Get Report

and BYD have been major players in the growth of clean tech and energy industries such as wind, solar, and battery power in recent years

MidAmerican Energy Holdings, a notable subsidiary of Berkshire Hathaway, has also been steadily increasing its stake in the alternative energy picture. Recently, the firm unveiled its massive plan to further step up its wind presence by installing nearly 600 megawatts of wind power in Iowa.

The energy created by the more 250 turbines will be enough to power 190,000 homes. According to a MidAmerican spokesperson, when the installation of the turbines is complete, the percentage of the company's capacity that comes from wind will stand at 25%.

Today, there are a number of ETF products available which seek access individual components of the alternative energy spectrum from a pure-play perspective. For instance, investors looking for concentrated exposure to the wind energy industry can turn to a fund such as the

First Trust ISE Global Wind Energy ETF

(FAN) - Get Report


However, rather than using such a concentrated fund to fulfill demand for alternative energy, conservative investors may find a product like the

PowerShares Wilderhill Clean Energy Portfolio

(PBW) - Get Report

more to their liking.

As we have seen over the past year, it is not uncommon to see heavily concentrated alternative energy funds such as FAN and

Guggenheim Solar ETF

(TAN) - Get Report

see dramatic day-to-day swings. In an attempt to tone down the volatility of these industries, PBW's assets are spread across a number of different facets of the clean energy sector.

On top of wind-related firms such as

China Wind Energy

(CWS) - Get Report


China Ming Yang Wind Power Group



Broadwind Energy

(BWEN) - Get Report

, PBW's index hosts companies hailing from the solar, battery and rare earth elements industries.

The fund's broad diversification into the realm of alternative energy will ensure that investors will be better protected against economic turmoil in the future.

Over the past 90-day period, the fund's broad approach has allowed it to handedly outperform both FAN and TAN, returning 25%.

Although green energy is sure to be a hot topic in the coming year, finding stable ways to invest in the industry can be a tricky task. Rather than attempting to target a small facet of the industry, conservative investors determined to follow the growth of the alternative energy industry over the long term would be better off opting for the diversified exposure that comes with owning PBW.

Written by Don Dion in Williamstown, Mass.


>>Wind Stocks: Bottom-Fishing, Big Orders

>>Top Dividend Stocks for 2011

At the time of publication, Dion Money Management did not own any of the equities mentioned.

This commentary comes from an independent investor or market observer as part of TheStreet guest contributor program. The views expressed are those of the author and do not necessarily represent the views of TheStreet or its management.