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.
An estimated 80 million, taking up around 30 per cent of woodland across the country. By contrast, Dutch elm disease killed around 25 million elm trees between the 1970s and the 1990s. Fallen ash leaves are an ideal source of nitrogen and other feeds for animals and other plants.