Nuclear power is the only large-scale power production technology which does not produce greenhouse gases. Properly handled, the safety hazards are acceptable - many European countries produce a significant proportion of their electricity from nuclear plants (eg about 60% in France, 25% in the UK). The UK is currently planning a new generation of nuclear power plants as a major step towards reducing CO2 emissions.
There are a number of advanced designs of nuclear reactor which are more efficient, less complex, and inherently much safer than current generation plants, most notably the
Pebble Bed Reactor design.