well..volcanic eruptions can affect climate in two main ways. First, they release the greenhouse gas carbon dioxide, contributing to the warming of the atmosphere.
There is so much happening when a volcano erupts. It can cause pollution in the air with smoke and ashes. It destroys the land and takes it away for animals and living. Can cause earthquakes with eruptions. Causes mudslides, power outages, drinking water contamination. Causes less rain and destroys crops.
