Postings without closing dates are often positions that are difficult to fill or ones that come open frequently. An example of a position that is difficult to fill is a psychologist at a small-town state hospital. If the hospital left the job open for a month, it is unlikely to get a sufficient number of applicants.
The Disadvantages of Tidal Power Tidal power is growing rapidly in interest as countries look for ways to generate electricity without relying on fossil fuels. Tidal schemes have a number of advantages, including their lack of greenhouse gas emissions and 100% renewable nature.
Letâs rack up the pluses and minuses. Tidal Power Pros and Cons. Pros. 1  Renewable. 2  Requires no fuel. 3  Emission-free. 4  Reliable, a plant can last 100 years. 5  High efficiency. 6  Predictable output. 7  Could potentially provide a storm surge barrier.nnovators have long recognized the potential to capture great quantities of clean, free energy from these tides that can be used to spin turbines and readily produce electricity. Records of ocean power conversion date back to 900A.D. where the power of tidal movement was used to grind grains.