Today's presentation of the Vanier gardens, given by the head gardener Mark, taught us all about the intricate practice of permaculture. The term "permaculture", which means permanent agriculture, is a considerably new term, however the practice of maintaining a sustainable agricultural ecosystem is centuries old. Permaculture derives from Aboriginals who used forests to sustain themselves. Mark explained that this kind of sustainable agriculture uses plants for every possible reason. For example, the above picture is of a plum tree and below it are two plants called the comfrey plant and…