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Efficiency in production and cost are hurdles but are definitely improving.
The major obstacle making it tough in all forms is the lack of "energy ice cubes" or batteries in addition to problems in transmission of the energy that is created. Solar and wind production are both problematic in that the peak production times aren't typically in line with peak use.
I'm glad to see improvement but it is still detrimental to our country to move away from coal and nuclear. Clean Coke and natural gas still need support and development if we want to be energy independent.
It would be outstanding if we could get to the point where solar or wind were legitimate for single home use and was reliable.
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