While my late Professor Dr Neumann was showing me a museum on the outskirt of a German town , the instruments to fight each other were swords . He commented " The most significant progress makind has made is to develop instruments of mass destruction. Nuclear bombs present on the surface of the earth can destroy the entire earth several times. The peaceful use of nuclear energy has been proposed by several nations. However if the most advanced nation of the world find it difficult with all their knowledge, technology and will power to contain the nuclear disasters what will happen if such disaster will take place in not so technologically advanced country with limited resources and manpower and will to fight it out - the nuclear disaster. Time has come when mankind has to make choices and choices are very limited for survival with green plants or face perils of nuclears disasters man made or natural. Its for you to decide.