What three new viruses have come about in the 21st century?

It just all depends on where you live at the moment

The process by weathered rock and mineral particles are removed from one area and transported elsewhere

Explosive eruptions are the most hazardous, involving large volumes of tephra and gases emitted from the volcano. lahars, pyroclastic flows, ashfall, and many other volcanic hazards are commonly associated with explosive eruptions. explosive eruptions are very dangerous. basically, any form of hazard can occur.