Freshwater lakes are bodies of water that contain low concentrations of salt, making them different from oceans and seas. They are essential ecosystems that support a variety of wildlife, including fish, birds, and plants. Some well-known examples of freshwater lakes include Lake Superior and Lake Baikal, which are famous for their size and unique biodiversity. These lakes play a crucial role in providing drinking water, recreational opportunities, and habitats for many species. They also help regulate the local climate and can be found in various regions around the world, from the Great Lakes in North America to the African Great Lakes in East Africa.