Nature has always been very good at engineering in circular ways, it uses renewable resources to fuel its operation, creates life from death and wastes very little indeed, Humans on the other hand ...
... have a much more linear approach to life.
The world famous yachtswoman Dame Ellen MacArthur has set up a foundation to tackle sustainability which works with education and business to inspire people to re-think, re-design and build a positive future.
If you are interested, and would like to be inspired towards more sustainable solutions, either in your workplace or your own lifestyle, have a look at the Ellen MacArthur Foundation Web-Site.
There are many short films to watch, but the one called "Get Loopy" is funny, it encapsulates some of the problems that we all, for the sake of our descendents, have got to face up to.