All Issues
Lead toxicity: Assessing the risk to U.S. children
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National studies have increasingly linked even low levels of lead exposure to IQ deficiencies and behavioral disorders in young children (page 180). In September, a new study connected attention deficit disorders to lead, among other factors (see www.ephonline.org).
When transgenes wander, should we worry? This issue: plants, animals, and fish
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Pollen-coated bees on a passion flower. Pollination is one of the ways that transgenic crops can hybridize with other crops and native plants. (No transgenic passion flowers have been field-tested in California.) Photo by Howard Creech .
Restoring clarity: The search for Tahoe solutions
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During the last half century, Lake Tahoe has lost 30% of its famed clarity. Scientists report new findings on the major culprits- sediments and excess nutrients. An editorial overview reviews the lake's history, and news stories explore clarity models, Sagehen reserve and weed control. Shown: Emerald Bay
Food policies, food choices: Market incentives for health
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With rates of obesity and nutrition-related diseases skyrocketing, scientists and policy experts have proposed agricultural policies that would encourage consumers to make healthier food choices. In this issue, a panel of experts debate's diversified agriculture with its hundreds of specialty crops (page 5), and a policy analyst argues for market incentives to encourage better nutrition among food stamp recipients (page 8).
October-December 2006
Volume 60, Number 4
Volume 60, Number 4