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.
The cedar elm (Ulmus crassifolia) features a rounded canopy of branches, and the tree possesses the smallest leaves of any of the native elm trees in the United States. The leaves are from 1 to 2 inches long and an inch in width. The cedar elm is a popular shade tree in states such as Texas and Oklahoma, and it grows native there as well as in portions of Louisiana, Arkansas and Mississippi. The tree will grow quickly in moist soil to as high as 80 feet.