But what's so important about capturing and keeping water?
Well the more you capture and keep, the less you need to use. And, Kent stresses, if you capture it, you keep it from running off into the ocean, especially if you live near the coast. And that's incredibly important, because the water that runs-off from our gardens tends to pick up to carry things like pesticides, oil, and cleaning solutions along with them.
Read more about Kent's book at the LA Times Home blog.
(Image: Douglas Kent)