How does Shishaldin affect the environment?

The Shishaldin Volcano affects the environment in both positive and negative ways. Harmful gases are emitted into the air during eruptions and stay in the air for long periods of time. Shishaldin can cause large pyrocalstic flows but, luckily, it is far enough away from any major towns to prevent any catastrophic damage. Few people visit the mountain and there are no towns near enough to be harmed.