A: Styrofoam does not decompose in the environment under normal circumstances. Much like plastic, Styrofoam is made from a polystyrene-based petroleum product that is not biodegradable. Plastic takes hundreds of years to decompose, and Styrofoam takes much longer because it is a stronger form of plastic.
View Full Document. Zone of wastage: Is the area in which melting or ablation rates exceed those of snowfall (Fig.2). â¢ The snow line: Is the boundary between the zone of accumulation and that of wastage, and could therefore be defined as the highest level at which winter snow melts in the summer. VI- Internal structure of a glacier.
alpine zone A region that occurs above the tree-line and below the snow-line on temperate and tropical mountains.The vegetation is characterized by an absence of trees, and varies greatly with aspect, the greatest contrasts being between the wet side and the dry, leeward side of the mountains concerned.lpine zone A region that occurs above the tree-line and below the snow-line on temperate and tropical mountains.