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.
Age Range of Trees. Trees can live, in very rare cases, up to six thousand years, although reaching that age is highly unlikely. Trees are most likely to live to old age in old-growth forests. For example, a Douglas Fir may live anywhere from 400 to 600 years in optimal conditions. As a shorter example, the average cherry tree life expectancy is around 20 years.