Word: san
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...will be trained to inject the cell treatment at specific locations, where the cells will remain to do their nerve-nurturing work. "I think it's incredibly exciting," says Dr. Susan Fisher, a stem-cell scientist and a professor of obstetrics, gynecology and reproductive science at University of California, San Francisco. "This really provides a blueprint for how to do these sorts of trials. It really proves the principle that these sorts of human embryonic-stem-cell therapies can survive the FDA approval process...
...that a boost in those technologies could decrease soot emissions - fast. "We can't fix every environmental problem, but we can make a huge and immediate change by reducing black carbon," says Veerabhadran Ramanathan, Director of the Center for Clouds, Chemistry & Climate at the University of California at San Diego. (Black carbon manifests as soot particles that comprise brown clouds.) While carbon dioxide levels in the atmosphere respond on a sluggish 100-year timescale to reductions in emissions, soot particles, whose effects are equivalent to roughly half the warming damage that carbon dioxide does, have a shelf life of only...
...with millions of local projects requiring little or no government planning. Moreover, by choosing a relatively low-tech policy that the world could readily copy, we would at last become leaders in climate protection - and in rejecting the needless and dangerous expansion of nuclear power. Egan O'Connor, San Francisco...
...Another underutilized energy-efficiency tip: for new construction, orienting buildings correctly and optimizing window locations can cut energy use by a quarter or more. These are savings from Day One - and at no extra cost. Dave Deppen, San Rafael, Calif...
From 1910 to 1940, a million immigrants seeking a better life in the U.S., most of them Chinese, were processed on Angel Island, a tiny dot of land in the San Francisco Bay, roughly 45 minutes from San Francisco. In 1970, the Angel Island Immigration Station was scheduled for demolition, but a California state park ranger named Alexander Weiss made a remarkable discovery: hand-carved fragments of Chinese poetry hiding under layers of graffiti and plaster in the walls of the derelict barracks. This find stopped the wrecking ball and began a decades-long campaign to turn the site into...