The opposition by left parties is basically because th agreement is with US. The point is the agreement gives us a choice of building new plants etc and therefore we should go ahead nad create the choice. We have not yet developed the thorium based technology.We cannot work on the assumption that it will be a reality in the near future. The agreement does not prohibit us from developing this technolgy. The IPI pipeline assumes that we can get secured supplies via Pakistan. This is highly debatable because experience has shown that the Pakistan Government is highly unreliable.Further, even if we accept their assurances at face value, we still have the question regarding the capability to prevent terrorist attack. The problem with Nuclear technology is that mankind has no proper technology to handle the radio active wastes. However, we do not have a better solution today to sove our energy needs.