The best method of clear-cutting is to scatter the cut sections, called "blocks" over a wide area. As these areas re-grow, a forest of different ages and species is created. This is better than scalping a whole valley or mountain, which is ecologically disastrous. Clear-cutting is a problem throughout the Northwest. In British Columbia, however, so many areas are being clear-cut that less and less virgin rainforest is left between the blocks. Not only is there an increasing number of clear-cuts, but the areas are huge.