Solar & Nuclear Energy

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Across
  1. 2. / _____ and wind energy have continued to occupy the top spots in terms of the cheapest renewable energy sources.
  2. 3. / there are two fundamental nuclear processes considered for energy production one of them is called _____.
  3. 4. / Solar energy is caused by _______ .
Down
  1. 1. / Both Solar & Nuclear energy produce ___ .
  2. 2. / Solar energy is caused by the ___.
  3. 3. / The other fundamental nuclear process is called ____.