It’s almost Earth Day again. Each year, on the appointed day, thousands of Americans make a ritual of caring for the planet: planting a tree, picking up litter, or simply stopping to smell the roses. Yet the interest, of course, goes far beyond that for many, even reshaping leisure pursuits. Growing trends in ecotourism and agritourism do not necessarily signal a transformative new mindset about the environment, but the surging popularity of visiting working farms, farmers’ co-ops, and public markets and patronizing farm-to-table-minded restaurants suggest more than a passing fancy for seeking bonds to the natural world around us. Traditional tourist destinations seldom figure prominently in any discussion of environmental tourism, but they should. Take water, for instance. Near- and long-term concerns about water…