I think its something many of us think about. I know I do.
My lovely sister sent this to me, I thought this was a really good Ted Talk, if you don't know about Ted Talks I highly recommend them.
TED is a nonprofit devoted to Ideas Worth Spreading. It started out (in 1984) as a conference bringing together people from three worlds: Technology, Entertainment, Design. Since then its scope has become ever broader. You can read more about Ted here