1. It’s Gettin’ Hot in Here!

2. Key Points Greenhouse Gases-Review Impacts of greenhouse gases
What is the Greenhouse Effect
Global Warming
Global Cooling

3. Greenhouses Gases Review
Carbon Dioxide-
Man-made: burning of fossil fuels and deforestation
Natural: respiration and decomposition
Methane
Man-made: agriculture, livestock and polar ice melting
Natural: swamps and animal digestion
Tropospheric Ozone (not the ozone layer)
Man-made: Chemical reaction with N2O, VOC’s and Ultra violet light (from burning of fossil fuels)

4. Water Vapor Nitrous Oxide Hydroflourocarbons Aerosols Refrigerants
Increased evaporation as temperatures rise
Nitrous Oxide
Fertilizers
Fossil fuel combustion
Hydroflourocarbons
Aerosols
Refrigerants

5. Impacts of Increasing Greenhouse Gases in the Atmosphere
Earth’s temperature will rise
Human health can be affected.
Good affects
Bad affects
Sea level will rise
Shores lines will erode
Flooding of the shores
4. Harm living things (other than humans)

6. What are ways that Carbon Dioxide gets into the atmosphere?
Burning of Fossil Fuels by:
Factories
Driving automobiles
Using electricity
Planes
Trains
Can you think of anymore???
Deforestation
When trees are cut down, they can no longer take in carbon dioxide.
Forest Fires
When trees are burned, they release their carbon back into the atmosphere.

8. GLOBAL WARMING What is global warming?
An increase in average global temperature
Carbon Dioxide:
Can stay in the atmosphere for more than 100 years.
Air contains 30% more CO2 than in 1700’s
Levels rising about .4% per year

9. Carbon Dioxide Trends
Carbon Dioxide Levels have been increasing steadily over the past 45 years
Over past 400,000 years: As CO2 increases, temperature increases -(gets warmer and as CO2 decreases , temperature decreases-gets cooler.

11. Reducing Greenhouse Gases
Recycle
Decrease use of electricity
Alternative energy sources
Automobiles-use less often, carpool, fuel efficient, walk when possible, ride bikes when possible, electric cars.
Decrease deforestation
What else can we do?

12. New Technology Heat and cool buildings Transportation
Make products use less energy
Produce energy without using fossil fuels

13. Climate Change is not just about warming the climate!
Cooling the climate is also called climate change
What events can change the climate and make it cooler?

14. Natural Ways of Changing Climate and making it COOLER GLOBAL COOLING
Volcanic Eruptions
See handout
Meteorite Impacts
Changes in how much sunlight reaches the Earth