Human Causes Of Climate Change

Question 1

Which green house gases do humans produce?(3)

Answer 1

Carbon dioxide
Methane
Nitrous oxides

Question 2

How do we release carbon dioxide into the air?(3)

Answer 2

Car exhausts
Burning fossil fuels
Deforestation and burning wood

Question 3

How do we release methane into the air?(4)

Answer 3

Farm livestock
Rice farming
Decaying organic matter - landfill
Burning biomass for energy

Question 4

How do we release nitrous oxides into the air?(4)

Answer 4

Car exhausts
Agricultural fertilisers
Electric power stations
Sewage treatment

Question 5

How does the greenhouse effect work?

Answer 5

• The sun gives short wave radiation to warm up the earth
• Earth gives off heat in the form of long wave radiation
• Green house gases absorb some of the energy which keeps the earth warm.