Sixty miles outside Buenos Aires, construction crews soon will be swarming over a partially built concrete dome abandoned 12 years ago, resuming work on Argentina's long-delayed Atucha II nuclear power plant. They will be in the vanguard of surging interest in nuclear power worldwide.

Faced with evidence that coal- and oil-fired electric plants are overheating the planet, and alarmed by soaring demand for electricity, governments from South America to Asia are turning once again to a power source mostly shunned for two decades as too dangerous and too costly.

Globally, 29 nuclear power plants are being built. Well over 100 more have been written into the development plans of governments for the next three decades. India and China each are rushing to build dozens of reactors. The United States and the countries of Western Europe, led by new nuclear champions, are reconsidering their cooled romance with atomic power. International agencies have come on board; even the Persian Gulf oil states have announced plans for nuclear generators.