Climate Change

Question 1

How do volcanic eruptions cause climate change?

Answer 1

• During eruptions, carbon dioxide, water vapour, sulfur dioxide, dust and ash are released into atmosphere
• Sulfur dioxide reacts with water vapour to form sulphur-based particles i natmosphere
• Work with dust and ash to reflect solar energy into space
• Less sunlight reaches earth, temperature is lowered

Question 2

Describe how deforestation causes climate change

Answer 2

• Loss of forests due to clearance of trees for human purposes
• timber companies, commerical value of trees
• land needed for agriculture, commercial land, residentail areas

-loss of carbon lungs

• forests are carbon sinks absorbing and capturing carbon dioxide from atmosphere
• Deforestation: cutting down of trees, carbon dioxide is released into the air

Question 3

Describe how changing land use causes climate change

Answer 3

Agriculture:
-Global increase in meat consumption, increased livestock reared

E.g.
Argentina, one of the world’s largest beef producers
-methane gas from livestock makes up 30 percent of greenhouse gas emissions
-widespread use of machines in agriculture, additional carbon dioxide

Industry:

• production of goods and services
• involves burning of fossil fuels, production of GHG as by-products

Urbanisatoin:
process where more people live in urban areas
-widespread use of fossil fuels for energy
-high concentration of vehicles, large ghg emissions