Temperate forests are areas with high levels of precipitation and humidity that contain a variety of deciduous trees that shed their leaves in fall and winter. They have cool summers and cold winters, with temperatures ranging from 86°F to -22°F. Temperate forests are located in eastern Asia, western and central North America, and eastern North America. They support a wide variety of plants and animals and have distinct canopy, understory, and forest floor layers. Major threats include timber cutting, acid rain, invasive species, unsustainable forestry practices, and climate change. Conservation efforts include reducing car use, recycling, and choosing sustainable products.