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Solar Industry's Long Term Outlook

Could you comment on silicon-based solar companies. My understanding is that the silicon processing causes pollution and increases the weight of the panels. ENER has the lightest panels and like First Solar does not utilize silicon. ENER has so many other inventions either being or waiting to be commercialized that it offers a diversification in alternative energy which none of the other companies can claim.

How The Polysilicon Shortage Affects Solar Energy Stocks

You have not discussed Energy Conversion that has expanded their solar business and Does not rely on polysilicon.