The taiga biome has harsh winters that last up to six months with sub-freezing temperatures and moderate precipitation. Plant life is limited mostly to lichens, mosses, and evergreen coniferous trees that grow closely together for protection. Animals have adapted to the cold through migration, hibernation, or other means to cope with food scarcity. Global warming threatens the taiga biome by potentially shifting climatic zones hundreds of kilometers north and reducing the biome's coverage by 50-90% over the next 50 years.