Climate fight without nuclear generation?

Japanese earthquake turned many things upside down. Nuclear power is one thing, the hot potato. Governments are reviewing their nuclear policy. German government is planning to fade out their nuclear power plants.

Surprisingly, strong support for nuclear power is coming from some environmental groups. They claim that it is almost impossible to achieve cliamte goal without nuclear generation. Climate benefit from nuclear generation is bigger than potential danger of it. It is hard to tell when we see the horrible pictures of Fukushima nuclear plants.

For your reference, Emmanuel Fages, head of power, gas, carbon and coal research group, at French bank Societe Generale provides estimates of potential GHG emissions:

A global freeze on nuclear expansion projects would mean an additional 280 million tonnes of carbon dioxide equivalent in annual average emissions over the next 20 years. And if existing plants are retired and replaced with fossil-fuel burning generation and some renewables, then annual emissions could increase by as much as 860 million tonnes on average over the period 2010-2030.
(from Carbon Market News by Point Carbon, Published: 18 Mar 2011 01:01 PM CET)

What do you think? Keep going with nuclear power in order to achieve climate goal? Or, find and promote alternative energy risking climate future? We all are facing tough decisions.