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Is Nuclear Energy Clean ? Continuation

This Article is a continuation of the Last article that i posted "IS Nuclear Energy As Clean As They Claim?"

Such accidents, as well as the ongoing use of nuclear energy itself, raise two serious concerns, says John Carew, a physicist at Brookhaven National Laboratories in Upton, N.Y.: safety and nuclear waste. Nuclear fission converts some uranium in fuel rods to plutonium, which remains radioactive for about 240,000 years. Spent fuel rods are stored in cooling ponds at nuclear plants. But ponds are filling up worldwide, and so far scientists haven't come up with safe permanent storage sites for nuclear waste.
If radioactive particles, or nuclides (NEW-clides) escape into the atmosphere from a nuclear power plant or factory, wind currents can blow particles over cities, countries, even around the world. Certain nuclides remain dangerous for hundreds or thousands of years, such as strontium (120 years) and cesium (300 years).
The amount of radiation released in Japan was too small to pose an international threat--unlike the 1986 explosion at the Chernobyl plant in Ukraine that irradiated over two million people in Ukraine, Russia, Belarus, and Eastern Europe.