Chemistry of the Atmosphere: Climate Change and the Greenhouse Effect

Question 1

How have human activities led to an increase in greenhouse gases?

Answer 1

Carbon dioxide - combustion and deforestation
Methane - increased farming and decomposition in landfills

Question 2

What are some potential effects of global climate change?

Answer 2

• sea level rise which may cause flooding and increased coastal erosion
• more frequent and severe storms
• changes in rainfall patterns
• temperature and water stress for humans and wildlife
• changes in the food-producing capacity of some regions
• changes to the distribution of wildlife species

Question 3

What is a carbon footprint?

Answer 3

The total amount of carbon dioxide and other greenhouse gases emitted over the full life cycle of a product, service or event.

Question 4

What actions can be taken to reduce a carbon footprint?

Answer 4

• increased use of alternative energy supplies
• energy conservation
• carbon capture and storage (where CO₂ is trapped in solvents and stored underground
• carbon taxes and licences
• carbon off-setting including through stree planting
• carbon neutrality

Question 5

What are the problems of reducing the carbon footprint?

Answer 5

• scientific disagreement over causes and consequences of globally climate change
• lack of public information and education
• many people dont want to change their lifestyles
• economic considerations, it will cost money
• incomplete international cooperation