2. solar energy has been used economically for many years to

Economically solar power is very helpful and a big investment.  Solar power is created by using solar panels that absorb sunlight and convert it to solar power.  Solar power can then power electricity.  Rather than, fossil fuels, gas, etc, that which hurt the environment and take much more time and money to produce.  

"i care deeply about campaign finance reforms: - apex

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b gas tractor

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c and negotiated lower prices for farm equipment and supplies

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d the grange

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c over 15,000 bankrupt businesses

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c people became more self-sufficient