1 1 in 5 households and businesses in the U.S. receive their electricity from nuclear energy. 2  Nuclear power facilities can produce energy at a 91% efficiency rate 24/7, with virtually zero carbon emissions.  13% of the worldâs electricity comes from nuclear power plants that emit little to no greenhouse gases.
In general, all post office job applicants must be at least 18 (at time of appointment). There are no maximum age limits for USPS positions. There are a few exceptions that may apply: The minimum age may be lowered to 16 for high school graduates.
What does it Take to Join the Postal Service Jobs. In order for you to join the USPS Postal Jobs, you must be at least eighteen years of age and must be a citizen of the United States or have a valid Green Card. If you fulfil these basic requirements, then you are eligible to take the Postal Exam 473 for Postal Jobs.