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Your source for incisive, peer-reviewed articles that bring the insight and authority of our panel of experts and authors to bear on the most important ideas for creating a sustainable future.

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Wild populations of the world's five rhino species have been in steady retreat for centuries in the face of expanding human populations that encroach upon their habitat and hunt them for their meat and body parts. Since the 1970s, the greatest threat to rhinos has been the trade in rhino horn, which is sought for both ornamental purposes and as an ingredient in traditional Asian medicines used to treat a range of human ailments linked to toxicity and inflammation. In response to this threat, the world's governments listed all rhino species on Appendix I of the Convention on International Trade in Endangered Species (CITES), thereby effectively banning all international trade in rhino horn since 1977.1

The initial market response to the trade ban was a more than ten-...

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While climate systems are incredibly complex, the causes of contemporary climate change and many of the potential impacts are now well understood. The atmospheric concentrations of several greenhouse gases (e.g., carbon dioxide, methane, and nitrous oxide) have increased to unprecedented levels, in at least the past 800,000 years, and carbon dioxide levels are now hovering around 400 ppm, a concentration beyond the 350 ppm concentration now widely recognized as a target level to preserve our social systems. As a result, it is unequivocal that there is a warming of the climate system, including the atmosphere and oceans, and it is consensus that human influence has been the dominant cause of warming since the mid-20th century. We understand, with varying degrees of certainty, that this...

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As the Baby Boomers reach and move beyond traditional retirement ages, they are increasingly concerned about issues of aging. Although there are major social policy and political issues involved in...
Many natural resource management and biodiversity conservation problems are so-called wicked problems.1 Such problems involve multiple stakeholders with differing objectives and for whom the chosen...
Cache Valley has an air pollution problem. Nestled in the northernmost extension of the Wasatch Mountain range, the beautiful 50-mile agricultural valley of approximately 125,000 residents straddles...

In Focus

Environmental security has taken on new meaning in the twenty-first century as sustainability and natural resource...
The pathway for conversion to a renewable energy future has been pioneered by Denmark and a few other visionary nations. But...
If the United States intends to meet the Department of Energy’s goal of producing 20 percent of the nation’s electricity...
I fully agree with the idea that world population growth can—and should—be reversed through fertility rates that fall below...
The Guttmacher Institute provides estimates, covering various years in the last decade, of the proportions of all...