Download Human population and the environmental crisis by Ben Zuckerman, Editor, David Jefferson PDF

By Ben Zuckerman, Editor, David Jefferson

Discusses environmental difficulties, guidelines, moral, and clinical matters bobbing up from the impression of overpopulation on our planet.

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Natural, sustained, globally averaged rates of surface air temperature change (for example, from the breakup of the last ice age 15,000 years ago to the full establishment of our current interglacial age some 5,000 to 8,000 years ago) are about 1° C per 1,000 years. On the other hand, even the minimum projected human-induced rates of global climate change are on the order of 1° C per 100 years up to a potentially catastrophic rate of 5° C per 100 yearsthe latter being some 100 times faster than typical sustained globally averaged rates of climate change during which human civilization evolved and from which the current distribution of species and ecosystems emerged.

Many politicians, economists and religious leaders regard rapid population growth as "natural" and extol its virtues. For example, we often read that population growth stimulates the economy and is, therefore, good. This may be true if one's vision is expressed in units of four years and limited to a few decades at most. 5 billion years and human beings for a few million years. So the very rapid population growth of the past 100 or so years is not natural. If the current rate of growth of world population, about 2% per year, were continued into the year 3400, then each person now alive would have 1 trillion descendants and the total human population would be about 10,000,000,000,000,000,000,000 (10 sextillion).

What Does Comprise a Consensus on Global Warming? To support the contention that much is known and accepted by the vast majority of the knowledgeable scientific community, I offer the following list of a dozen points that are related to global warning. A good source of relevant discussion is the National Research Council's study on global warming and its implications (NAS, 1991). ) 1. Greenhouse gases such as water vapor (H2O), carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and chlorofluorocarbons (CFCs) trap infrared radiative energy in the lower atmosphere.

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