Humans 'may have saved world from ice age'

Humans may have unwittingly saved themselves from a looming ice age by interfering with the Earth's climate, according to a new study. The findings from a team of American climate experts suggest that were it not for greenhouse gases produced by humans, the world would be well on the way to a frozen Armageddon.


Scientists have traditionally viewed the relative stability of the Earth's climate since the end of the last ice age 10,000 years ago as being due to natural causes, but there is evidence that changes in solar radiation and greenhouse gas concentrations should have driven the Earth towards glacial conditions over the last few thousand years. What stopped it has been the activity of humans, both ancient and modern, argue the scientists.

Over the last 8,000 years carbon dioxide levels in the atmosphere have gradually risen, when previous trends indicated that it should have dropped. Methane, another greenhouse gas, had also increased instead of fallen. The unexpected trends could be explained by massive early deforestation in Eurasia, rice farming in Asia, the introduction of livestock, and the burning of wood and plant material, all of which led to an outpouring of greenhouse emissions.


The United States researchers, led by William Ruddiman from the University of Virginia in Charlottesville, used a climate model to test what would happen if these greenhouse gases were reduced to their "natural" level. They wrote in the journal, Quaternary Science Reviews: "In the absence of anthropogenic contributions, global climate is almost 2C cooler than today and roughly one-third of the way toward full glacial temperatures."

At the peak of the last ice age, which began 70,000 years ago, 97% of Canada was covered by ice. The research showed that without the human contribution to global warming, Baffin Island would today be in a condition of "incipient glaciation".... "Portions of Labrador and Hudson Bay would also have moved very close to such a state had greenhouse gas concentrations followed natural trends," said the scientists. The experiment had probably underestimated the amount of ice that would exist today in north-east Canada without human interference, they said.

Anthropologist Dr Benny Peiser, from Liverpool John Moores University, said: "If the research findings are correct, a radical change in the perception of anthropogenic greenhouse gas emissions will be required. "Instead of driving us to the brink of environmental disaster, human intervention and technology progress will be seen as vital activities that have unintentionally delayed the onset of a catastrophic ice age."

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THE CALIFORNIA PERCHLORATE SCARE

Some answers to the "spiritual counsellors" and other expert protestors:

"Newspaper columns in Southern California newspapers are bubbling with a new paranoia from those on the left side of the political spectrum about the recently released new safety guidelines for perchlorate in drinking water recommended by the National Academy of Sciences. The suspicion is that the Bush administration has somehow put its thumb on the prestigious National Academy, and like allegedly rigged elections and deceitful wars, is jeopardizing children's health by loosening the former EPA standard of 1 part per billion to 20 parts per billion of perchlorate in drinking water.

Letter writer Dr. Michael Storrie-Lombardi, M.D., in the Jan. 18 issue of the Pasadena Star News writes:

"Please encourage L.A. County and the governor to implement a higher set of water quality standards for our children's drinking water in spite of the federal government's malign intent."

South Pasadena resident Megeen McLaughlin writes in the Jan. 22 issue of the Star News:

"As a spiritual counselor, mother, sister, and friend, I speak with all too many mothers who are tormented by the suffering of their children from learning disabilities, attention deficit disorder, and other maladies. To think that these
afflictions may be linked to drinking water contaminated by perchlorate (a component of rocket fuel) is all the more disturbing."

[....]

The problem with the fear of perchlorate, according to many independent university toxicologists, is that other natural substances in the human diet have the same or greater effect as perchlorate. Thiocyanates (a salt) can inhibit iodine production in the thyroid and are found in milk, broccoli, cabbage, and Brussels sprouts. A 3.5 ounce serving of Brussels sprouts has the same effect as eating about 8,000 ppb's perchlorate, 8-ounces of milk not laced with perchlorate has the same effect of about 16 to 80 ppb's of perchlorate, and even drinking water that meets the U.S. Environmental Protection Agency's (EPA) standard for nitrates equates to about 90 parts per billion of perchlorate. U.C. Riverside toxicologist Bob Krieger states that the perchlorate risk is poorly understood and amounts to no more of a danger than eating Brussels sprouts. Moreover, it has now come to light that soybeans, used in tofu and soymilk, are another natural glandular disrupter similar to perchlorate.

There are even more disturbing problems with mandating costly cleanups of perchlorate from groundwater supplies.

The vast majority of the population in Southern California has for some 50-years been exposed to standard perchlorate levels (6 ppb) from Colorado River water without any documented widespread increase in hormonal abnormalities.

Secondly, casting aside the questionable methodologies of experimental studies with small sample populations, it would seem that the most reliable study of the health effects of perchlorate was that conducted on nearly 10,000 children from three cities in Chile where naturally occurring nitrate deposits make it the only place in the world where the effects of natural perchlorate have been measured for decades. Perchlorate is found in the groundwater in the Atacam Desert of Chile at about 120 parts per billion and dilutes into groundwater at 7 parts per billion, or about the same level as occurs in the Colorado River Aqueduct. Yet no effects on thyroid health among infants and children have ever been found beyond typical levels (J. Occup. Med. 2004, Jun: 46(6): 516-7).

The claim that perchlorate has entered the food chain and poses a health hazard in milk has also been proven to be bogus. As pointed out by Dr. Brahama Sharma, PhD, Fellow Royal Society of Chemists, it is chemically impossible for perchlorate to pose a health hazard in milk. Perchlorate (one atom of chlorine and four atoms of oxygen) is an ion which is negatively charged. Milk is composed of compounds of carbon, such as carbohydrates like lactose, which are abundant in milk and positively charged (Brahama D. Sharma, "Perchlorate Scare," Letter to Star News circa July 4, 2004). Thus, lactose in milk neutralizes perchlorate. In fact, one method of treating perchlorate contamination is by carbohydrate injection, which uses molasses or corn syrup as a neutralizer.

Dr. Michael Payne, a toxicologist at U.C. Davis, has stated: "Perchlorate definitely blocks (thyroid function) at high levels. But at these miniscule levels, any damage is theoretical. In fact, two studies conducted with populations' drinking water with much higher perchlorate levels than (those found in California milk) showed no adverse affects" ("Rocket Fuel Found in California Milk," SF Chronicle, June 22, 2004)"........

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THE STUPID TOKENISM YOU EXPECT OF SF

Inconveniencing people is what it is really all about

San Francisco may become the first city in the nation to charge shoppers for grocery bags. The city's environmental commission is expected to ask the mayor and board of supervisors Tuesday to consider a 17-cent-per-bag charge on paper and plastic grocery bags. Their goal is to reduce plastic bag pollution. Environmentalists say plastic bags jam machinery, pollute waterways and often end up in trees. Officials believe that the city spends five-point-two cents per bag annually for street litter pickup and one-point-four cents per bag for extra recycling costs. But grocers and bag manufacturers argue that many people already reuse their plastic bags. Other opponents call the plan an unfair and regressive tax on shoppers.

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Many people would like to be kind to others so Leftists exploit that with their nonsense about equality. Most people want a clean, green environment so Greenies exploit that by inventing all sorts of far-fetched threats to the environment. But for both, the real motive is to promote themselves as wiser and better than everyone else, truth regardless.

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