PPT Lecture: Global Warming

Slide 2 - Greenhouse Effect The process of the atmosphere trapping heat from the sun. Without the atmosphere, heat would float off into outer space. Earth would be about 30°F each day without an atmosphere.

Slide 3 - Other Planets Any planet with an atmosphere, experiences the greenhouse effect.

Slide 4 - Earth’s Atmosphere  78% Nitrogen  20% Oxygen  2% Other (CO2 for example)

Slide 5 - Venus’s Atmosphere  96% CO2  3% Nitrogen  1% Other

Slide 6 - Greenhouse Gases The only gases in the atmosphere that have the ability to trap heat from the sun. Both natural and unnatural (human made) gases!

Slide 7 - Natural Greenhouse Gases  Water Vapor  CO 2  Methane (CH 4 )  Nitrous Oxide

Slide 8 - Human Made Greenhouse Gases  Hydrofluorocarbons (HFCs)  Perfluorocarbons (PFCs)  Sulfur Hexofloride (SF6)

Slide 9 - Human Activities Add significantly to the amount of greenhouse gases in the atmosphere!

Slide 10 - CO2 Burning of fossil fuels (combustion) releases more CO2 in the atmosphere than would be present naturally.

Slide 11 - Transportation and Electricity Main reasons why CO2 is released in the atmosphere!

Slide 12 - Methane CH4 Gas released from animals. It’s also a greenhouse gas and causes Earth to heat up

Slide 13 - Farming The more animals we raise for food, the more methane released into the atmosphere. Pigs and cows release methane!

Slide 14 - Methane Chickens release methane!

Slide 15 - Deforestation (killing trees) Plants take in CO2 and convert it into O2 during photosynthesis. Less trees, more CO2 left in the atmosphere!

Slide 16 - Pollutants Anything that harms the environment!  Excess CO2 from burning fossil fuels.  Ozone Layer in stratosphere is destroyed from the release of CFCs caused by industry.

Slide 17 - Ozone Hole Developing South Pole

Slide 18 - Global Warming Boost in the greenhouse effect due to more greenhouse gases in atmosphere from human activities leading to warmer global temperatures.

Slide 19 - Global Warming Impacts  Increase evaporation  Ice at poles to melt

Slide 20 - Sea-Level Changes - Flooding Approx. 50% of the world’s population lives near coastlines, which may be under water in the future!

Slide 21 - What can you do?  Turning off lights when not in use.  Turning down heat in winter.  Reduce air conditioner use in summer  Recycling! Less energy is used to recycle than make from scratch.  Use public transportation or drive fuel efficient cars.

Slide 22 - Venus Since it has a lot of CO2, it has a stronger greenhouse effect than Earth. The plant is about 860 Degrees Fahrenheit.