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The new Global Challenges podcast and website describe scientific research explaining that food contains energy and requires energy to produce, process, and transport. Estimates indicate that between 8 and 16 percent of energy consumption in the United States went toward food production in 2007. Michael Webber and Amanda CuÉllar, in their study in ACS� journal Environmental Science & Technology, found that it takes the equivalent of about 1.4 billion barrels of oil to produce, package, prepare, preserve and distribute a year’s worth of food in the United States.

They said that despite this large energy investment, the U.S. Department of Agriculture estimates that people in the U.S. waste about 27 percent of their food. The scientists realized that the waste might represent a largely unrecognized opportunity to conserve energy and help control global warming.

The new podcast is available without charge at iTunes and from ACS at www.acs.org/globalchallenges. ACS encourages educators, schools, museums, science centers, news organizations, and others to embed links to Global Challenges on their websites. Recent podcasts in the series include the importance of hand-washing to stop the spread of disease; nanotechnology for more sustainable buildings and other structures, producing cost-effective biodiesel from sewage sludge and green exercise for better mental health.

Global Challenges/Chemistry Solutions is a series of podcasts describing some of the 21st Century’s most daunting problems, and how cutting-edge research in chemistry matters in the quest for solutions. Global Challenges is the centerpiece in an alliance on sustainability between ACS and the Royal Öйú365betÖÐÎĹÙÍø of Chemistry. It includes topics such as providing a hungry, thirsty world with ample supplies of nutritious food and clean water; developing alternatives to petroleum to fuel society; preserving the environment and assuring a sustainable future for our children; and improving human health.