Word: regrowth
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Over that 22-year span, Parker and the others noticed that the growth curve gradually bends upward, meaning the regrowth was accelerating - a hint, anyway, that controlled experiments involving enriched CO2 levels were indeed a reasonable if rough proxy of what would likely happen in the real world as CO2 levels mount. Whether the forests' growth spurt might actually impact global warming by absorbing and storing more carbon is doubtful. While it's true that more trees suck up more carbon, they also produce more dark, heat-absorbing foliage, which somewhat counteracts the benefit. In addition, one extra tree...
...example, raises good cholesterol, which helps reduce the risk heart disease. But it also makes the blood more likely to clot, which raises the heart disease risk. A cancer treatment that shrinks the size of a tumor is of limited value if it's soon followed by tumor regrowth...
...Beijing has sunk millions of dollars into the effort to stop the advance of the desert and has set up a system of laws to manage the land from afar; herders are being relocated and it's now forbidden to graze on badly hit areas. The slow process of regrowth has started in limited areas, and the sand storms hitting Beijing have been less severe in the last few years. Though some scientists chalk uo the latter to fluctuations in weather, others say it's a sign that the grasslands are starting to return to health. "Maybe some places...
...eighth month of 2001, the clock struck midnight on stem- cell research. After 9 p.m. on Aug. 9, 2001, therapeutic cloning—the production of new stem cell lines from early embryos—was officially denied federal funding. Since that time, researchers studying everything from tissue regrowth to cell differentiation have faced an unpleasant choice: use expensive, often poor-quality federal stem-cell lines, if they are available at all, or seek substantial amounts of private money to generate new ones...
Inflammation may be more of a problem in the earlier stages of autoimmune diseases like multiple sclerosis. So much tissue is eventually destroyed that nerve damage becomes permanent. "Your initial goal is to keep the immune response in check, but then you have to ask how you encourage regrowth of damaged tissue," says Dr. Stephen Reingold, vice president for research programs at the National Multiple Sclerosis Society. It could take decades to figure that...