Effects of Volcanoes

 Topic 3: volcanoes

Positive effects of volcanoes on human beings

Minerals mined for industrial use

• Ash form fertile land for Agriculture

• Geothermal power may be generated

• Geyser/hot springs favour development of resorts for tourists

Positive effects of volcanoes on the environment

• New landforms are created e.g. volcanic island (green land)

• Add of lava and ash to the soil and improve soil fertility.

• Bigger mountains are formed/more high land.

Negative effects of volcanoes on human beings

Short term effects of volcanoes

• Destruction of houses and buildings

• Lava and ash reduce visibility

• Destruction of crops and farm land by lava flow

• Mudflow due to ice melting on top of volcanoes trap people and cover roads

Long term effects of volcanoes

• Injuries and Loss of lives

• Ash and toxic gases can cause breathing problems

• Cause water borne diseases as water may be contaminated by ash.

• Damage of ozone layer can cause skin cancer.

The dog is burned by the lava, imagine if it a person

Negative effects of volcanoes on the environment

• Gases released in the atmosphere can damage the ozone layer leading to global warming

• Ash can block out sunlight and decreases world temperature

• Alter the landscape

• Destruction of natural vegetation

• Land sliding can lead to soil erosion

strategies to manage the effects of volcanic eruption

• Redirecting lava flow by digging trenches so that lava can not flow to people’s settlements.

• Emergency services should be in place e.g. rescue team

• Educate people on what to do in the event of volcanic eruption

• Spraying water onto the flow


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