Worries about declining biodiversity have become popular lately. On the first Earth Day, participants were concerned about saving a few particularly charismatic species such as the bald eagle and the peregrine falcon. But even then some foresaw a coming holocaust. As Sen. Gaylord Nelson wrote in Look, "Dr. S. Dillon Ripley, secretary of the Smithsonian Institute, believes that in 25 years, somewhere between 75 and 80 percent of all the species of living animals will be extinct." Writing just five years after the first Earth Day, Paul Ehrlich and his biologist wife, Anne Ehrlich, predicted that "since more than nine-tenths of the original tropical rainforests will be removed in most areas within the next 30 years or so, it is expected that half of the organisms in these areas will vanish with it."
There's only one problem: Most species that were alive in 1970 are still around today. "Documented animal extinctions peaked in the 1930s, and the number of extinctions has been declining since then," according to Stephen Edwards, an ecologist with the World Conservation Union, a leading international conservation organization whose members are non-governmental organizations, international agencies, and national conservation agencies. Edwards notes that a 1994 World Conservation Union report found known extinctions since 1600 encompassed 258 animal species, 368 insect species, and 384 vascular plants. Most of these species, he explains, were "island endemics" like the Dodo. As a result, they are particularly vulnerable to habitat disruption, hunting, and competition from invading species. Since 1973, only seven species have gone extinct in the United States.
What mostly accounts for relatively low rates of extinction? As with many other green indicators, wealth leads the way by both creating a market for environmental values and delivering resource-efficient technology. Consider, for example, that one of the main causes of extinction is deforestation and the ensuing loss of habitat. According to the Consultative Group on International Agricultural Research, what drives most tropical deforestation is not commercial logging, but "poor farmers who have no other option for feeding their families than slashing and burning a patch of forest." By contrast, countries that practice high yield, chemically assisted agriculture have expanding forests. In 1920, U.S. forests covered 732 million acres. Today they cover 737 million acres, even though the number of Americans grew from 106 million in 1920 to 272 million now. Forests in Europe expanded even more dramatically, from 361 million acres to 482 million acres between 1950 and 1990. Despite continuing deforestation in tropical countries, Roger Sedjo, a senior fellow at the think tank Resources for the Future, notes that "76 percent of the tropical rain forest zone is still covered with forest." Which is quite a far cry from being nine-tenths gone. More good news: In its State of the World's Forests 1999, the U.N.'s Food and Agriculture Organization documents that while forests in developing countries were reduced by 9.1 percent between 1980 and 1995, the global rate of deforestation is now slowing.
"The developed countries in the temperate regions appear to have largely completed forestland conversion to agriculture and have achieved relative land use stability. By contrast, the developing countries in the tropics are still in a land conversion mode. This suggests that land conversion stability correlates strongly with successful economic development," concludes Sedjo, in his chapter on forestry in The True State of the Planet, a collection of essays I edited. In other words, if you want to save forests and wildlife, you had better help poor people become wealthy.
Of course, the biggest environmental crisis facing humanity nowadays is supposed to be global warming. Not surprisingly, worries about the future climate were a common theme among alarmists on the first Earth Day. However, they couldn't agree on what direction the earth's temperature was going to take.
"The greenhouse theorists contend the world is threatened with a rise in average temperature, which if it reached 4 or 5 degrees, could melt the polar ice caps, raise sea level by as much as 300 feet and cause a worldwide flood," explained Newsweek in its special January 26, 1970, report on "The Ravaged Environment." In the service of balance, however, the magazine also noted that many other scientists saw temperatures dropping: "This theory assumes that the earth's cloud cover will continue to thicken as more dust, fumes, and water vapor are belched into the atmosphere by industrial smokestacks and jet planes. Screened from the sun's heat, the planet will cool, the water vapor will fall and freeze, and a new Ice Age will be born."
Kenneth Watt was less equivocal in his Swarthmore speech about Earth's temperature. "The world has been chilling sharply for about twenty years," he declared. "If present trends continue, the world will be about four degrees colder for the global mean temperature in 1990, but eleven degrees colder in the year 2000. This is about twice what it would take to put us into an ice age."
Watt was wrong. Global temperatures didn't fall, and fears of a new ice age dissolved like frost on an early-autumn morning. Since 1988, when government climatologist James Hansen testified before the Senate Energy and Natural Resource committee that he had detected global warming, climate doomsters have switched almost entirely to worrying about global warming. The theory is straightforward--burning fossil fuels like coal and oil puts excess carbon dioxide in the atmosphere; the carbon dioxide traps heat from the sun and re-radiates it, heating up the atmosphere.
It's generally agreed that the earth's average temperature has indeed gone up by 1 degree Fahrenheit or so in the past century. The question now is, How much man-made warming can we expect in the 21st century? Computer climate models originally predicted that atmospheric temperatures might increase between 3 to 5 degrees centigrade by 2100. However, as the models have been refined, their estimates of how much warming might occur have been declining--the range is now down to 1.5 degrees centigrade to 3.5 by 2100. A recent report from the National Research Council noted that "the surface apparently warmed by 0.25 C to 0.4 C since 1979." Remarkably, the NRC panel also estimates the change in the temperature of the atmosphere as being between 0 C to 0.2 C during the same period. In other words, the atmosphere may not have warmed at all since 1979. This is an odd conclusion because the climate computer models have never predicted that the surface would warm first or faster than the atmosphere--in fact, they predict the opposite. Consequently, this gap between surface temperatures and atmospheric temperatures calls the predictive accuracy of the models into serious question.
That doesn't give many doomsters pause. In February, climatologist Tom Karl of the National Climate Data Center issued a study suggesting that global warming is speeding up. In 1997 and 1998, argues Karl, there were 16 consecutive months in which "we were breaking the previous year's all-time global high temperature record." However, University of Virginia climatologist Patrick Michaels (who receives some funding from fossil fuel companies) points out that those 16 months of record high temperatures occurred during the big 1997-1998 El Niño in the Pacific Ocean. During El Niños, water from the western Pacific Ocean spreads eastward, dramatically warming the normally cold waters off the coast of South America and thus boosting average global temperatures. Temperatures have now dropped back to where they were before the El Niño occurred. El Niños are not predicted to be affected by any man-made global warming.
In any case, whatever global warming is occurring is apparently being channeled into winter nights. Summer daytime temperatures do not appear to be warming. Warmer winter nights are far less of a threat to the natural world and humanity than higher summer temperatures. Are our coasts about to be inundated by rising seas due to melting ice caps? The best guess from the U.N.'s Intergovernmental Panel on Climate Change is that the sea level might rise about 8 inches by 2100. While this may seem troubling, keep in mind that sea levels rose by about 6 inches over the last century.
Indeed, a far greater threat for the next century comes from environmental activists. To counteract global warming, they essentially want to plan the energy future of the entire world for the next 100 years. They are enacting the plan through the U.N. Convention on Climate Change and the Kyoto Protocol. The absurdity (and arrogance) of that type of planning becomes clear when one imagines the same exercise taking place in 1900. The best scientific panel available in 1900 would simply not have been able to plan for millions of automobiles and trucks, ubiquitous electric lighting in millions of houses and office buildings, fuel for thousands of jet planes, and millions of refrigerators, air-conditioners, and the like. Virtually none of the devices on this nearly endless list had even been invented by 1900. Given the increasing rate of technological innovation, we undoubtedly have even less chance of foreseeing the future than people in 1900.
Why So Wrong?
How did the doomsters get so many predictions so wrong on the first Earth Day? Their mistake can be handily summed up in Paul Ehrlich and John Holdern's infamous I=PAT equation. Impact (always negative) equals Population x Affluence x Technology, they declared. More people were always worse, by definition. Affluence meant that rich people were consuming more of the earth's resources, a concept that was regularly illustrated by claiming that the birth of each additional baby in America was worse for the environment than 25, 50, or even 60 babies born on the Indian subcontinent. And technology was bad because it meant that humans were pouring more poisons into the biosphere, drawing down more nonrenewable resources and destroying more of the remaining wilderness.
We now know that Ehrlich and his fellow travelers got it backwards. If population were necessarily bad, then Brazil, with less than three-quarters the population density of the U.S., should be the wealthier society. As far as affluence goes, it is clearly the case that the richer the country, the cleaner the water, the clearer the air, and the more protected the forests. Additionally, richer countries also boast less hunger, longer lifespans, lower fertility rates, and more land set aside for nature. Relatively poor people can't afford to care overmuch for the state of the natural world.
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Lovely piece:-)
and writing NOW in 2010 I see the same hysteria and Erlich, Holdren, and Hansen STILL predicting the end of the world and population control.
wish THEY could be controlled and kept away from the public, Gores their next best mate.
shows no matter How much Proof these people are Liars and Idiots the chance of Money and Fame keeps the SCAM going.
Humanity may just"Stupid" itself out of existance!
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