The advent of ecosystem ecology has created great difficulties for ecologists primarily trained as biologists, since inevitably as the field grew, it absorbed components of other disciplines relatively foreign to most ecologists yet vital to the understanding of the structure and function of ecosystems. From the point of view of the biological ecologist struggling to understand the enormous complexity of the biological functions within an ecosystem, the added necessity of integrating biology with geochemis try, hydrology, micrometeorology, geomorphology, pedology, and applied sciences (like silviculture and land use management) often has appeared as an impossible requirement. Ecologists have frequently responded by limiting their perspective to biology with the result that the modeling of species interactions is sometimes considered as modeling ecosystems, or modeling the living fraction of the ecosystems is considered as modeling whole ecosystems. Such of course is not the case, since understanding the structure and function of ecosystems requires sound understanding of inanimate as well as animate processes and often neither can be under stood without the other. About 15 years ago, a view of ecology somewhat different from most then prevailing, coupled with a strong dose of naivete and a sense of exploration, lead us to believe that consideration of the inanimate side of ecosystem function rather than being just one more annoying complexity might provide exceptional advantages in the study of ecosystems. To examine this possibility, we took two steps which occurred more or less simultaneously."

Americans love their lawns with a passion rarely seen in other countries; fifty-eight million Americans enthusiastically plant, weed, water, spray, and mow an estimated twenty million acres of lawn. But is our dedication to these lawns contributing to the serious environmental problems facing the planet? The authors in this book state that the lawn may be an ecological anachronism, and they argue that we must rethink the way we care for our lawns so that these small pieces of the environment will demonstrate our commitment to a more ecologically sound world. The authors outline the origins of ideas about the lawn and the reasons for its enduring popularity. They describe the development of ideas about its form and the making of the lawn into an object of beauty. They explain how the lawn industry has encouraged the spread of the "industrial" lawn to sustain high sales of mowers, seeds, fertilizers, pesticides, and irrigation equipment. However, say the authors, Industrial Lawns can have high environmental costs: for example, power motors contribute to regional air pollution and global warming; excess fertilizers and pesticides wash off our lawns and run into our wells, streams, and lakes; grass clippings that are bagged and hauled away are major contributors to solid waste problems; and the watering of lawns depletes scarce water supplies. How can we create environmentally sound lawns? The authors offer a variety of ideas - such as moderation in our use of lawn supplements, ecological use of grass varieties, the substitution of hand mowers for power motors, and the use of grass clippings to fertilize the lawn. These strategies can help us to care for conventional lawns in ways lessdangerous to the environment. They also propose two more radical alternatives: Freedom Lawns that allow natural and unrestricted growth of grasses, clover, wildflowers, and other broad-leafed herbaceous plants; and total replacement of the lawn with new landscape designs. By choosing these alternatives - which can be aesthetically pleasing as well as ecologically correct - we can unite our environmental concerns with direct personal action, acting locally while thinking globally and creating a new garden aesthetic in the process.

In this book a distinguished group of environmental experts argues that in order to solve global environmental problems, we must view them in a broad interdisciplinary perspective that recognizes the relations-the interconnected circle-among ecology, economics, and ethics. Currently the circle is broken, they say, because environmental policy is decided on short-term estimations of material that take little account of the economic or moral burdens that will be borne by future generations if we deplete our resources now. We must, assert the authors, have a better knowledge of the science underlying our environmental problems, we must understand their causes and consequences in relation to our economic and political systems, and we must recognize that an effective response will require a shift in a technologically oriented society's ethical attitude toward the natural environment. The authors address a wide range of concerns from global atmospheric degradation and spreading toxification of the environment to loss of forests and massive species extinctions. They offer to general readers, students, and professionals practical assessments and remedies for many of these problems. They suggest, for example, mechanisms that provide economic incentives for conservation; engineering and technical adaptations to use resources more effectively and dispose of waste products; better economic accounting procedures for measuring the real environmental costs of our depletion of natural resources; and a remodeled education system that better prepares us to see each individual's responsibility to the environment.