Professor Akimasa Sumi and his collaborators have carried out computer
simulations using climate models for many years.
According to their results, it seems very very clear that the anthropological
emission of greenhouse gases (mainly CO 2 ) is a main contributor to global
warming.
We must stop the emission of CO 2 to avoid global warming.
23.3 The Development of Renewable Energy Must
Be Promoted. However, It Will Require
Sufficient Resources of Time and Budget
According to the world energy outlook of IEA, the total electric power generation
will be increased as shown in Fig. 23.3. The electric power generated by renewable
energy is predicted as shown in Fig. 23.4. The electric power generated by renewable energy other than water power will increase very slowly, from about 4 % in
2010 to only 15 % in 2035, whereas the electric power generated by nuclear energy
will be kept almost constant from 13 % in 2010 to 12 % in 2035.
We must try to increase renewable energy more as quickly as possible.
In this respect, I commend Germany, which has strived to increase the development of renewable energy (Fig. 23.5) after 2000. In 2010, electricity generated by
renewable energy reached 103.5 billion kWh. Deducting that generated by water
power, we have 82.9 billion kWh. Total electric power generation in Japan was
976.2 billion kWh in 2010; that is, electric power generated by renewable energy
other than water in Germany in 2010 was only 8.5 % of the total electric power
generation in Japan in the same year. The electric power generated by nuclear
energy in Japan was 300.4 billion kWh in 2010. Therefore, electric power generated
in Germany by renewable energy sources other than water in 2010 is only 28 % of
this amount. Germany has striven so much in these 10 years from 2000 to 2010, and
the average price of electricity per house has doubled; that is, Germany has invested
a large budget. It takes many years to increase renewable energy, and the result is
still not satisfactory. Even if Japan tries as much as Germany, it will takes at least
30 years to replace nuclear energy by renewable energy. Meanwhile, Japan must
depend on fossil fuel, which increases CO 2 emissions into the atmosphere. To
import fossil fuel, the deficit in foreign trade of Japan, which is now already more
than 4 trillion yen (about $40 billion), will continue as the result of the decrease in
nuclear energy.
When we stop all nuclear power stations in Japan, renewable energy must be
increased, not only to replace nuclear energy but also the energy produced by fossil
fuel. Is this really possible in the near future? It is time for us to deliberate upon the
future of energy in Japan to guarantee energy security, to avoid global warming,
and to stabilize the economy of Japan.
274
A. Arima
simulations using climate models for many years.
According to their results, it seems very very clear that the anthropological
emission of greenhouse gases (mainly CO 2 ) is a main contributor to global
warming.
We must stop the emission of CO 2 to avoid global warming.
23.3 The Development of Renewable Energy Must
Be Promoted. However, It Will Require
Sufficient Resources of Time and Budget
According to the world energy outlook of IEA, the total electric power generation
will be increased as shown in Fig. 23.3. The electric power generated by renewable
energy is predicted as shown in Fig. 23.4. The electric power generated by renewable energy other than water power will increase very slowly, from about 4 % in
2010 to only 15 % in 2035, whereas the electric power generated by nuclear energy
will be kept almost constant from 13 % in 2010 to 12 % in 2035.
We must try to increase renewable energy more as quickly as possible.
In this respect, I commend Germany, which has strived to increase the development of renewable energy (Fig. 23.5) after 2000. In 2010, electricity generated by
renewable energy reached 103.5 billion kWh. Deducting that generated by water
power, we have 82.9 billion kWh. Total electric power generation in Japan was
976.2 billion kWh in 2010; that is, electric power generated by renewable energy
other than water in Germany in 2010 was only 8.5 % of the total electric power
generation in Japan in the same year. The electric power generated by nuclear
energy in Japan was 300.4 billion kWh in 2010. Therefore, electric power generated
in Germany by renewable energy sources other than water in 2010 is only 28 % of
this amount. Germany has striven so much in these 10 years from 2000 to 2010, and
the average price of electricity per house has doubled; that is, Germany has invested
a large budget. It takes many years to increase renewable energy, and the result is
still not satisfactory. Even if Japan tries as much as Germany, it will takes at least
30 years to replace nuclear energy by renewable energy. Meanwhile, Japan must
depend on fossil fuel, which increases CO 2 emissions into the atmosphere. To
import fossil fuel, the deficit in foreign trade of Japan, which is now already more
than 4 trillion yen (about $40 billion), will continue as the result of the decrease in
nuclear energy.
When we stop all nuclear power stations in Japan, renewable energy must be
increased, not only to replace nuclear energy but also the energy produced by fossil
fuel. Is this really possible in the near future? It is time for us to deliberate upon the
future of energy in Japan to guarantee energy security, to avoid global warming,
and to stabilize the economy of Japan.
274
A. Arima