These diagrams show, carbon
dioxide emissions in Japan are increasing despite more and more nuclear energy
being generated (54 reactors in last 45 years).
Also they show that co2 emission decreased in Germany, Denmark, and
Sweden. Those countries have been developing
technologies of alternative energy without relying on building new nuclear
power stations for global warming issue. 
http://www.47news.jp/47topics/e/218274.php
Natural uranium contains
only 0.7% of Uranium 235, which is used as a nuclear power fuel, so it
has to go through a long process of mining, refining, transporting,
concentrating, and making it into pellets. Storing and keeping the spent
fuel rods cool for so many years , and using very
large thick concrete walls for building the nuclear power stations – all of these processes rely on other energy
sources unless there is another nuclear power station
nearby (and there usually isn’t.).
Strictly speaking it doesn’t
produce CO2 only when electricity is generated. No country has yet developed an effective way of
dealing with nuclear waste. Japan has the best gas turbine technology (using
methane=city gas as fuel so it doesn’t produce much CO2) in the world.
Before the Fukushima disaster, nuclear power produced
25% of Japan’s electricity. While nuclear was being used, half of the thermal
power stations were
closed. At the
moment they are going to rely on gas or oil powered thermal power stations for
a while. I think that using more gas turbine systems to keep
CO2 emissions low could buy some time to develop alternative ways of generating
electricity, for example using geothermal energy sources. There are so many hot springs places
throughout Japan.
(Mia June)
Reference:
Lies of Nuclear Power by
Mr. Hiroaki Koide
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