From the viewpoint of geology, the volcanism is a kind of Earth guards, it protects the Earth through releasing the internal force. Volcanoes and geothermal are "twin brothers." Where there are volcanoes, there are generally geothermal resources. Geothermal energy is a cheap, and pollution-free new energy, so it has been widely used in industrial processing, power generation, agricultural greenhouse, aquaculture, household heating, and hot spring hydrotherapy.

Changbaishan Hot Spring

Minerals: Basalt is the most widely distributed volcanic rock. Terrestrial basalt often crystallizes to form natural copper and Calcite; submarine basalt can form large-scale iron and copper ore.

Diamond and agate gem formation are also related to volcanic activity.

Volcanic Agate

Diamonds

Soil: Volcanic activity can create land resources and fertile soil for human beings. Many of the new lands and islands have been associated with volcanic eruptions. Volcanic ash is rich in nutrients and is a good natural fertilizer. Volcanic eruptions can damage the environment and destroy trees. They can also bring new life to some areas and breed new plants to support other organisms.

Kilimanjaro

Landscape: After a volcano erupted, it often produced beautiful natural scenery. Many of the world's famous scenic areas are volcanoes, such as crater lakes.

Tianchi in Changbaishan

Yellowstone