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.
Elm Tree Types: List of Different Types of Elm Tree. There are over 30 species of Elms, below is listed the more common varieties. Elm Tree, Detailed Facts & Information on Elm Trees. Here is some general information on the elm tree. Elms are deciduous and semi-deciduous trees comprising the genus Ulmus, family Ulmaceae.