What are the disadvantages of renewable energy sources?

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One disadvantage is convenience. People make decisions based on convenience, let's just face it. Often renewable resources involve paying more, going out of our way, or doing something different than we are used to. That will always be a disadvantage of using renewable resources.
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In addition, while "conventional utilities aren't fully capable of incorporating the new technologies to make energy," private homeowners who might be willing to convert their homes to ones using more efficient renewable energy sources find the costs to do this prohibitive. Even with potential government credits for converting to more efficient systems, all but the wealthiest owners would be hit hard financially, and it would take many years to recoup the money. In this economy, a lot of people can’t wait that many years to recoup the expenses.

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The biggest disadvantage to all renewable energy sources is that conventional utilities aren't fully capable of incorporating the new technologies to make energy.  There are still technological and cost barriers (solar panels are still fairly expensive, for example) but as the price of generating energy conventionally continues to rise, and along with the improvements in technology and manufacturing, components needed to generate renewable energy will become cheaper.  To some degree, this is in effect -- and, at least where near I live, windmills are now finally appearing alongside power plants.  Much of the "alternative" energy systems are most effective if situated at your home; this is perhaps the most difficult philosophical obstacle from a corporate standpoint, which is attempting to incorporate them into a big distributed system.  Why have solar panels hooked into the grid, and lose much of the energy in transit?  Why not directly connect panels to the home? What would the big distributed system do then?

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