Original sentence: After many years of lower than replacement rate construction, nuclear power plants are again poised for cautious growth.Much has occured since then to polarize the issue: the melt down of reactor #4 at Chernobyl in 1986, the discovery of global warming and its link to carbon dioxide, and increased competition for world oil reserves have led some to believe nuclear power is a part of a solution, while others see it as part of the problem.Some nuclear scientists claim the risks have been addressed with new technology and some Environmentalists believe nuclear power could safely reduce global warming because nuclear power plants generate far fewer greenhouse gases than fossil fuel plants.The construction of new power plants abrubtly ended during the 1980's when efforts to conserve energy disrupted the projected growth for new energy demand
Edited sentence: Also, there is concern about oil and natural gas becoming increasingly less available due to depletion and competition for them.Finally, proponents and some environmentalists promote nuclear power as a viable alternative to the pollution caused by fossil fuels, since nuclear power plants, once built, generate essentially no greenhouse gases.Proponents of nuclear power believe that these risks are small and can be addressed with new technology