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.
Huge oaks can live to be 200 years old. Acorns are the fruit of oak trees. Every fall these often massive, stately trees produce a rain of acorns that are quickly eaten, buried, or stored by a wide variety of animals. Acorn size varies from one-fourth inch to over 2 or 3 inches, depending on the species.