Richard, if we are going through the list it seems that Communication and Automobiles are more interested topics to our readers and environmental issues are the concerns, where most of them commented. I think this type of analysis will help you to plan which are the topics more interested to our community members.
It's nice to see readers interested in articles interested in issues that affect the environment, like global warming and hybrid cars. I'm expecting the environment and ways engineers and designers can improve energy efficiency in products as well as be more environmentally friendly in general to continue to be hot issues in 2013.
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