Professor Bill Hammack, aka YouTube's Engineer Guy, is one of my favorite new subscriptions. He has a gift for breaking very complex things down in a way that are easy to understand. Take some time and watch how a golf ball is made, how hard drives work, and how cell phones are designed.

 

But this video in particular should be required viewing for all of us. In this video he talks about what is actually in our landfills.

 

 

 

Are you on TwitterFollow me (@sheagunther) there, I give good tweets.

 

And if you really like my writing, you can join my Facebook page.

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