5.9.2.2 Human Activities Which Contribute To An Increase In Greenhouse Gases In the Atmosphere

Question 1

Which greenhouse gases do some human activities increase?

Answer 1

• carbon dioxide
• methane

Question 2

What are examples of human activities which increase greenhouse gas levels?

Answer 2

• driving (carbon dioxide)
• consuming electricity (carbon dioxide)
• raising livestock (cows - methane)
• decay of organic waste in landfill sites (methane)

Question 3

What do many scientists believe based on peer-reviewed evidence?

Answer 3

• human activities will cause the temperature of the Earth’s atmosphere to increase at the surface, resulting in global climate change

Question 4

What is a result of global climate change being a complex system to model?

Answer 4

• simplified models, speculation and opinions presented may only be parts of evidence and possibly biased