If you want more information, there's a list of further resources for the educated non-specialist in the back of Just Water. I'll also shamelessly plug my TED-Ed videos, which are aimed at high-school students as well as life-long learners: what you need to know about global fresh water in four-minute, animated videos! [See here and here for examples.]
For younger students, StudentsRebuild (a project of the Bezos Family Foundation) has been doing a "Water Challenge" for middle schoolers all year, with great resources for that age bracket.
I also worry that water's "value" will come to be seen as solely an economic category. Surely, economic valuation is a fabulous and important tool in our global economy. But markets should not be ultimate arbiters of value, especially for something like fresh water.
Environmentally, socially, theologically, and philosophically, it's clear that the value of water transcends market value or price (see Chapter 3!). I'm a pragmatist who supports innovation, and I believe that entrepreneurship and economic exchange have their place in environmental policy. But it's immoral for pursuit of profit to be the only motivating force, or the dominant conversation partner, for the value of something as essential and complicated as fresh water. This is where theology, philosophy and ethics—as well lived experience—have major contributions to make. Those insights may well be the wisdom that preserves the possibility of existence on every level of scale, from the local to the planetary, in an era of fresh water scarcity.
The task is ongoing: I too am constantly learning, discerning, analyzing, revising, re-framing. Dealing with water scarcity and water ethics is not like solving a straightforward algorithm. It's what sociologists refer to as a "wicked problem"—an issue with many inputs, implications, and unintended consequences. That can be daunting; but it can also be a pragmatic invitation to jump in wherever your abilities and insights may be useful.
Catholic Ecology: With many thanks to you, Dr. Peppard, and with assurances of the prayers of many for your continued work seeking the just use of water.