Original sentence: Advocates also claim that it is possible to relatively rapidly increase the number of plants.Advocates of nuclear power argue that nuclear power is a cost competitive way to produce energy versus fossil fuels when taking into account externalities associated with both forms of energy production.Historically, however, coal and hydropower power generation has both been the cause of more deaths per energy unit produced than nuclear power generation.New technology can affect the date of the peaks for fossil fuels and how much energy each unit of fossil fuel produces: exploration may become less expensive and more accurate; the costs of drilling and mining may decrease; resources deeper in the ground may become recoverable; the percentage of fossil fuel recovered from a field may be significantly increased; improved monitoring systems may reduce production costs and extend the life of marginal wells; storage and transportation losses and costs may be reduced; and refining and power plants may become more efficient.Typical new reactor designs have a construction time of three to four  years.. 43 plants were being built in 1983, before an unexpected fall in fossil fuel prices stopped most new construction.Using life cycle analysis, advocate claim, it takes 4-5 months of energy production from the nuclear plant to fully pay back the initial energy investment
Edited sentence: Advocates of nuclear power argue that it is a cost competitive way to produce energy versus fossil fuels, especially if you take into account fossil fuel externalities, the same way nuclear reactors have to pay for their pollution and plant decommissioning costs.Coal and hydropower has caused many more deaths per energy unit produced than nuclear.If energy becomes scarce, this could be important.It is possible to relatively rapidly increase the number of plants.New reactor designs have a construction time of 3-4 years.. 43 plants were being built in 1983, before an unexpected fall in fossil fuel prices stopped most new construction.New technology can affect the date of the peaks for fossil fuels and how much energy each unit of fossil fuel produces: exploration may become less expensive and more accurate;; the costs of drilling and mining may decrease; resources deeper in the ground may become recoverable; the percentage of fossil fuel recovered from a field may be significantly increased; improved monitoring systems may reduce production costs and extend the life of marginal wells; storage and transportation losses and costs may be reduced; and refining and power plants may become more efficient.Nuclear energy gives more energy per input energy than many other energy sources.Using life cycle analysis, it takes 4-5 months of energy production from the nuclear plant to fully pay back the initial energy investment