Was going to post something based on my experience, but when poking around found this article which does a much better job than I could: <a href="http:&#x2F;&#x2F;blogs.scientificamerican.com&#x2F;brainwaves&#x2F;outgrowing-the-traditional-grass-lawn&#x2F;" rel="nofollow">http:&#x2F;&#x2F;blogs.scientificamerican.com&#x2F;brainwaves&#x2F;outgrowing-th...</a>