Avalanches

An avalanche is a quick flow of snow on a slope. It usually happens on mountains but it can also happen on gentler slopes too. There are a few ways to prevent avalanches or to lessen their power. One way to prevent them is snow fences as the snow builds up around the walls and doesnt roll down the hill. They also plant trees as it slows the avalanches down. It is said that avalanches can be triggered by shouting, although these are just myths and are not true as the sound waves are not big enough.