Temperate forests are found in areas with four seasons like Western Europe and Eastern North America. They have broad leaves that absorb sunlight for photosynthesis before falling in autumn to prevent water loss in winter. Temperate forests have three layers - a top canopy layer up to 30 meters tall, a middle shrub layer, and a bottom forest floor layer of grasses, mosses and ferns. Unlike tropical rainforests, temperate forests are more sparsely spaced and only have a few varieties of hardwood trees like oak, elm, and maple that shed their leaves seasonally.