I agree with you ER, but
I would add that the energy from nuclear activity should also be included in the calculations when considering the disappearance of polar ice.
I have not compered the atmospheric effects generated by cow flatulence and radioactive effects to see which is worse for the environment, but I suspect that the radioactivity is worse.
The estimates from ten years ago seem convincing to me, see the following web site.
http://www-pub.iaea.org/MTCD/publications/PDF/te_1591_web.pdf
