In the environment of the great plains, there are prairies powerful winds, there are cold winters and blistering summers. Their environment is almost all grassland. There are almost no trees in the Great Plains.
The Native Americans of the Great Plains hunt and farm for food. They hunt mostly bison and buffalo, they never waste a single part of the things they catch.
The Native Americans of the Great Plains believe that there are spirits that help them have successful harvests. They also hold ceremonies honoring the spirits. But if they don't have ceremonies then the spirits will make the have unsuccessful hunts.