Original sentence: Among those challenges are continuing opposition to nuclear power, uncertainty about the management of spent fuel, and high capital costs (see Economics of new nuclear power plants).Though projections show growth in nuclear power, longstanding challenges lead to significant uncertainty in that projected growth.Two reactors under construction in Europe have been delayed and are running over budget
Edited sentence: Another recurring problem is the high capital cost of nuclear power technology compared with other energy sources.Nuclear power may be making a resurgence, but long-standing problems with the technology still could lead to canceled orders and renewed anti-nuclear opposition.Nuclear’s difficult history with financing could be repeating itself, as the first two reactors that were meant to lead a renaissance have been delayed and are running over-budget.One problem is what to do with the dangerous radioactive waste produced by nuclear power stations