1. Cloning technology which is to make an exact copy of a plant or animal by taking a cell from it and developing it artificially.
2. Cloning has advantages. For example, it gives stable supply of food and be helpful to protect endangered animals.
3. It is scarcely used for people due to related ethical problems.
4. However if we use this technology for people, there might be many good results.
5 For example, we can make artificial organs and transplant organs easily.
6. This technology has many good uses, but it has many problems, too.
by Naoki Hayashi
Source
http://www.mext.go.jp/a_menu/shinkou/shisaku/kuroun.htm
A nuclear arm is a weapon which explodes by nuclear fission or fusion. It is also also known as an atomic bomb.
Atomic bomb is a fission type weapon, which was used to attack Japanese cities Nagasaki and Hiroshima. On the other, hydrogen bomb is a fusion type bomb.
Today, 7 countries have nuclear arms: USA, Russia, United Kingdom, France, China – these countries were WW II allies. India and Pakistan also have it. In addition, North Korea , Israel and Iran may have it.
Nuclear arms are very powerful and dangerous weapons. And the risk of nuclear war increases as weapon are developed.
So, we should reduce the number of nuclear arms.
by Shin Moriyasu
