After the water supplies are contaminated, the soil is rendered infertile, most ecosystems implode, and the climate changes ... sure, some humans might survive. But I wouldn't envy their lives of eating cockroaches and moss and delivering misshapen children.

yeah i've heard that, and after reading this i still wouldn't be surprised if we do. the effect of radiation clouds, nuclear winter, etc. is far far far more devastating than the blasts themselves, which even according to this guy could still kill hundreds of millions.