The Government has offered Australia's three mobile operators, and vividwireless, renewal of their existing spectrum allocated on 15 year licences in the late 90s and early 2000s at set prices, while the Government expects to rake in $3 billion.
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William Atkins
Sunday, 03 February 2008 22:48
The greenhouse gases warm the atmosphere but the fine particles cool the atmosphere.
However, as these scientists point out, the greenhouse gases remain in the atmosphere for a hundred years or so, while particulate matter falls back to Earth’s surface within a matter of days (from precipitation).
In other words, the cooling effect from particulate matter is short-term (matter of days) while the warming effect from carbon dioxide and other greenhouse gases is long term (a hundred years or so).
Thus, scientists--countering this statement from the Norwegian scientists that shipping does not have a warming effect on the Earth but rather a net cooling effect (more cooling than warming)--point out that the cooling effect from shipping is not really there to counter the warming effect.
Additional information on these critical remarks is found in the New Scientist article “Transport emissions study 'misleading' say experts.” (subscription needed)
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