1. Causes and Impacts of Climate Change

2. Greenhouse Gases

3. Anthropogenic Sources of Greenhouse Gases
Anthropogenic greenhouse gases: human-produced greenhouse gases

4. Carbon Dioxide Most significant anthropogenic greenhouse gas Sources:
Burning fossil fuels
Deforestation (10% of CO2 emissions)

5. Chlorofluorocarbons (CFCs)
Sources:
Refrigeration agents
Declining because of international treaties

6. Methane Sources: Agriculture
Decay of organic materials in landfills and sewage plants
Coal Mining
Natural gas extraction
Deforestation

8. The Anthropogenic Greenhouse Effect
The increase in the amount of heat trapped in the atmosphere as a result of higher levels of human made greenhouse gases
This is leading to an increase in the Earth’s average global temperature
Humans are enhancing the natural greenhouse effect

9. Feedback Loop Increase in greenhouse gases  increase in temperature
Increase in temperature  increase in greenhouse gases (from carbon sinks)
If this continues, Earth’s average global temperature will likely increase by 2°C to 6°C

10. Greenhouse Gases in Canada
We are one of the highest producers world wide!
Some sources:
Producing and using energy
Transportation
Fossil fuel extraction
Agriculture
Industry
Waste management
Land use and forestry

11. Consequences
(Bill Nye debate)

12. Global Impacts of Climate Change
Intergovernmental Panel on Climate Change (IPCC) formed in 1988 to evaluate risks
Rising Sea Level  floods
Impacts on Agriculture  draughts or floods
Impacts on Ecosystems  migration, loss of biodiversity
Impacts on Human, Plant and Animal Health  pests and diseases

13. Special Concerns for Canadian Arctic
Happening more rapidly due to albedo effect
Ex: Melting Sea ice
Harder for polar bears
Change people’s way of life

14. Homework Read pg. 384-385, 390-392, 412-416 Questions: pg.389 #1, 3