Volcano
Volcanoes are often referred to as the safety valve of nature because they release built-up pressure beneath the Earth's surface. Here is an explanation of why volcanoes are considered the safety valve of nature:

Pressure Release
- Volcanoes help in releasing the pressure that builds up within the Earth's crust due to the movement of tectonic plates. When this pressure is not released, it can lead to catastrophic events like earthquakes.

Magma Movement
- Volcanic eruptions release magma from the Earth's mantle, allowing it to flow to the surface. This movement of magma helps in relieving the stress and pressure within the Earth's crust.

Preventing Explosions
- If the pressure within the Earth's crust is not released through volcanic eruptions, it can lead to explosive events like earthquakes or even super-volcanic eruptions. Volcanoes act as a safety valve by preventing such catastrophic events.

Environmental Impact
- Volcanic eruptions also play a crucial role in shaping the Earth's surface and creating new landforms. They contribute to the natural processes that maintain the balance of the Earth's ecosystems.

Conclusion
In conclusion, volcanoes are called the safety valve of nature because they help in releasing the pressure within the Earth's crust, preventing catastrophic events like earthquakes. Their role in maintaining the equilibrium of the Earth's geological processes is essential for the overall health of our planet.

B. Ozone Gas