Word: limited
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Dates: during 1990-1999
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Robert D. Putnam, Dillon professor of international affairs and Stanfield professor of international peace at the KSG, says he "never comes close" to reaching the 20 percent limit...
...baby. There are plenty of biologists who believe that aging and death are as inevitable as taxes. No one really knows if human longevity will come up against a fixed barrier somewhere or if, like the sound barrier, it is there only to be broken. Some gerontologists say the limit of the average life-span is 85 years; others, 95, 100, 150 and beyond. No one understands the economic barriers either. Ronald Lee, a demographer at the University of California, Berkeley, calculates that for each year we add to the average life-span, the economy will have to grow...
...stay hurt. But for more than a decade, researchers have been learning to overcome these problems, figuring out ways to heal damaged cords and switch the power back on in spines long since gone dead. Even if Reeve and others don't walk by 2002, there is no limit to what may happen in the decades that follow. Says clinical neurologist Ira Black of the Robert Wood Johnson Medical School in Piscataway, N.J.: "There's been a revolution in our view of the spinal cord and its potential for recovery...
...something else is going on, and I think Malthus may have sensed it coming. As long ago as 1679, Antoni van Leeuwenhoek (the Dutch inventor of the microscope) speculated that the limit to the human population would be on the order of 13 billion--remarkably close to many current estimates. For our position in the natural world is once again undergoing a sea change. We are not the first nor are we the only species to spread around the globe, but we are the first to do so as an integrated economic entity. Other species maintain tenuous genetic connections...
...smokestacks and stashing it underground--but the most direct way to control carbon dioxide in the atmosphere is not to put it there in the first place. This is the point of the 1997 Kyoto Protocol--signed by 84 nations but not ratified by the U.S. Senate--which would limit developed countries' carbon emissions from cars, power plants and other major users of fossil fuels...