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Paleobiologist Anthony D. Barnosky weaves together evidence from the deep past and the present to alert us to the looming Sixth Mass Extinction and to offer a practical, hopeful plan for avoiding it. Writing from the front lines of extinction research, Barnosky tells the overarching story of geologic and evolutionary history and how it informs the way humans inhabit, exploit, and impact Earth today. He presents compelling evidence that unless we rethink...
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For years, we have been warned about the looming danger of overpopulation. However, since the 1970s we have been facing exactly the opposite problem: people having too few babies. Population growth has been slowing for two generations. The author explains why the population implosion happened and how it is remaking culture, the economy, and politics both at home and around the globe.--Provided by publisher.
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"In 2030, as 77 million baby boomers hobble into old age, walkers will outnumber strollers; there will be twice as many retirees as there are today but only 18 percent more workers. How will America handle this demographic overload? How will Social Security and Medicare function with fewer working taxpayers to support these programs? According to Laurence Kotlikoff and Scott Burns, if our government continues on the course it has set, we'll see skyrocketing...
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Past attempts to answer this question have ranged widelyfrom less than 1 billion to more than 1,000 billion - one sign that there is no single right answer. More than half of the estimates, however, fall within a much narrower range: between 4 billion and 16 billion. In any case, with the world population now at 5.7 billion, and increasing by approximately 90 million per year, we have clearly entered a zone where limits on the human carrying capacity...
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