If you do not develop nuclear energy you will continue to be dependent on fossil fuel which will perpetually keep you vulnerable to the pressures of oil producing countries of middle east. You will not be able to tackle Islamic terrorism and Pakistan will be able to keep you mum in different International fora. If you go ahead with the N-deal then even if US stops supplying you N-fuel when you go for a nuclear test, at least Russia will be able to supply you the N-fuel. Presently even Russia is not able to supply us N-fuel. Killing this deal will only isolate us even further and only Pakistan and China will benefit.