Why did you choose to make solar cells over other topics?

Question: Why did you choose to make solar cells over other topics?
- Keywords:
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  energy
  
  preference
  
  solar cells
Asked by ckgandblue to Matthew on 17 Jun 2013. This question was also asked by harrymclachlan.
- Matt Carnie answered on 17 Jun 2013:
  
  Working in photovoltaics (the science of solar cells) combines aspects of chemistry, physics and materials science and I find them fascinating. They are also important for trying to build a future where we can make electricity without putting more CO2 into the atmosphere.
  
  How cool is it being able to make electricity from sunlight!

Question: Why did you choose to make solar cells over other topics?