The difference between them is the Pure Sine Wave inverter produces a better and cleaner current. They are also considerably more expensive. You might find it practical to get a small Pure Sine Wave inverter for any special need you may have, and also a larger Modified Sine Wave inverter for the rest of your applications.
Elm Trees can live over 100 years in their natural environment.
Eastern Red Cedar ----juniperus virginiana. It normally grows 30 or more ft tall with some specimens reaching over 80 ft and 30 ft wide. It can live a very long life with some specimens in Iowa are over 500 years old on rocky high spots.