It's one basic question about nuclear disposal that I have never understood. Nuclear "fluel" like Uran, etc comes from nature - right ? The way nuclear fuel is produced is by increasing the consentration of nuclear material - right ? As the nuclear fuel is used and energy is taken out should'nt the amount of redioactive energy be less than it was at the starting point ? While burning radioactive fuel, and producing energy from this, should'nt the amount of radioactivity in the world be less and not greater ? Why is is not possible in some way to reverse the radiactive fuel back to the original materiel after it has been used ? Why is it like that radioactive stuff that has been used for energy production is very dangerous, while beeing in the nature without having been used for energy production, it is not dangerous. When producing nuclear energy, you are taking something out of the nature, radioactive fuel that is concidered to be not so dangerous, and when you "burn it" and the energy and the radioactive content is less, then it is more dangerous. How can this be ?