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coolscorpio - December 2006

NUCLEAR WASTE: The Unsolved Problem

December 14th 2006 14:52
By the year 2000, the nuclear industry will have created 201,000 tons of highly radioactive irradiated (used) fuel rods. Many ideas for "final" disposal have been put forward, but none has proved even remotely adequate. One problem is that the plutonium in the waste will remain radioactive for up to 240,000 years (12,000 generations) or more. For that entire time it must be isolated from all living organisms and from the water, land and air upon which they depend.

Deep underground burial of wastes is currently the favored policy of most nuclear nations. However, changing water tables, earthquakes and other geological factors will eventually disturb the buried waste and lead to contamination of soil, water and air



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GLOBAL WARMING

December 12th 2006 01:25
Global warming is a natural phenomenon. But we make it worse which happens every few thousand years anyway. Did you ever know the fact that when dinosaurs were around the Earth was on average 20 degrees warmer than it is today?

Global warming is now a fact, although it is still disputed whether it is a natural cycle or man created or something in between. It’s going to have a big effect in the next 50 years for sure. We have already heard icebergs breaking off from the Arctic and Antarctic (e.g. New Zealand is seeing icebergs for the first time in 38 years); glaciers are melting; the gulf stream is said to be slowing down; animals are moving northward; the polar bear may go extinct shortly; birds are nesting earlier; species are dying off faster (e.g. 70% of a certain variety of frogs have died because of habitat warming



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PLUTONIUM: The Most Dangerous of All

December 8th 2006 15:02
Nuclear power reactors produce a mixture of plutonium radio nuclides. There is no doubt that plutonium, deposited in the human lung is a powerful producer of lung cancer. Approximately five millionths of a single gram of reactor plutonium deposited in the lung will do it.

On August 6, 1945, the US government exploded a uranium bomb over Hiroshima, Japan. Over 100,000 people were killed instantly. Three days later, a plutonium bomb destroyed Nagasaki, immediately killing 70,000 people. Many thousands more have since died from the ongoing effects of radiation poisoning


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CORK

December 5th 2006 14:04
Cork is a material that grows as the bark of the Cork Oak tree. More than half of the world's cork originates in Southern Portugal. The bark of the Cork Oak tree is harvested about every 9 or 10 years, and it is allowed to dry for 1 to 2 years. Next it is boiled to remove any toxins or other harmful agents, and then it is graded and cut. After a final cleaning and drying, the cork is sorted and ready for use.

Cork is most commonly used for wine bottle stoppers, but it can also be found in bulletin boards, flotation devices, and floor tiles. Worldwide cork demand is on the rise primarily due to increasing wine consumption. Ramping up cork production, however, is a lengthy process since cork trees can only be harvested about once per decade. Synthetic cork has been developed to satiate the growing demand


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ASPARAGUS

December 1st 2006 01:08
Your text goes here ASPARAGUS


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How do fishes and small insects develop in stagnant water?

December 1st 2006 01:06
Stagnant water strictly means water that is without motion or static water, so as long as there is enough dissolved oxygen in the water to sustain aquatic life, life will go on as normal.

If there is no oxygen available however, most multi-cellular organisms cannot be able to cope. The environment is anaerobic and will sustain only bacteria that can live in this environment and other creatures (such as mosquito larva) that get their oxygen directly from the atmosphere above. Such environments are important in processes such as fossilization and in the early stages of hydrocarbon formation


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