In China, Japan and Korea it kills elms, horse chestnut, poplars, maples, alders, willows and a range of fruit trees.

BBC: By BBC Environment Correspondent Robert Pigott

The forests are abundant with medicinal plants and mushrooms, and the fields produce maize, squash, tomatoes, beans, watercress and potatoes, as well as a large range of fruit.

BBC: In Oaxaca, a community unchanged

Over the past few years, its stores have been offering a wider range of salads and fruit as well as premium strength coffee.

BBC: A broader menu has helped the chain appeal to new customers