posted on Nov, 24 2005 @ 09:00 PM
Studies of ancient Antarctic ice cores are shedding light on the impact that the history of human development has had on the environment. Tests show
that atmospheric carbon dioxide levels have increased nearly 25% in the past two centuries alone.
Shafts of ancient ice pulled from Antarctica's frozen depths show that for at least 650,000 years three important heat-trapping greenhouse gases
never reached recent atmospheric levels caused by human activities, scientists are reporting today.
The measured gases were carbon dioxide, methane and nitrous oxide. Concentrations have risen over the last several centuries at a pace far beyond that
seen before humans began intensively clearing forests and burning coal, oil and other fossil fuels.
The sampling and analysis were done by the European Program for Ice Coring in Antarctica, and the results are being published today in the journal
The evidence was found in air bubbles trapped in successively older ice samples extracted from a nearly two-mile-deep hole drilled in a remote spot in
East Antarctica called Dome C.
Please visit the link provided for the complete story.
Humans are impacting nature on this planet at an unprecedented rate. Toxic biproducts of human development have been unavoidable as we, as a race,
have achieved previously unimaginable levels of comfort and technology.
Can we develop technology to reverse the damage that we have done to the environment? It may prove to be the most difficult challenge mankind has
faced - because there is no money in it.
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[edit on 11/24/2005 by Zipdot]
[edit on 12/1/05 by FredT]