slide1
Download
Skip this Video
Download Presentation
Stonehill College Global Warming: Learn what it is. Learn what you can do. Cheryl Schnitzer

Loading in 2 Seconds...

play fullscreen
1 / 17

Stonehill College Global Warming: Learn what it is. Learn what you can do. Cheryl Schnitzer - PowerPoint PPT Presentation


  • 77 Views
  • Uploaded on

Stonehill College Global Warming: Learn what it is. Learn what you can do. Cheryl Schnitzer Associate Professor Department of Chemistry. Climate Change. Average Temperatures of Planets. 285F. 850 F. 45 F. –46 F. Mercury. Venus. Earth. Mars. Sun. Venus has a stronger

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Stonehill College Global Warming: Learn what it is. Learn what you can do. Cheryl Schnitzer' - merrill-jensen


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Stonehill College

Global Warming:

Learn what it is.

Learn what you can do.

Cheryl Schnitzer

Associate Professor

Department of Chemistry

Climate Change

average temperatures of planets
Average Temperatures of Planets

285F

850F

45F

–46F

Mercury

Venus

Earth

Mars

Sun

Venus has a stronger

natural greenhouse effect

than Earth

http://www.kidsastronomy.com/venus.htm

slide4

The Greenhouse Effect

30% reflect back into space

NaturalGHE: one blanket

EnhancedGHE: pile on more blankets, accumulate GHGs

Define

Global warming!

Sun shines

GHGs trap heat in atmosphere

70% absorbed

Heat released by Earth

Earth’s surface warmed

slide7

Sources of Carbon Dioxide

Combustion Reaction:

Hydrocarbon + O2(g)  CO2 + H2O + Energy

http://news.nationalgeographic.com/news/2007/08/070809-coal-arctic.html

http://www.fotosearch.com/DGT072/cb025748/

http://www.epa.gov/climatechange/emissions/co2_human.html

carbon dioxide in the atmosphere
Carbon Dioxide in the Atmosphere

Photosynthesis dominates during warmer part of year

6 CO2 + 6 H2O → C6H12O6 + 6 O2

slide9
Reference: Blue Hill Meteorological Observatory

http://www.bluehill.org/anntemp.gif

some effects of climate change
Some Effects of Climate Change

Droughts and wildfires more frequent

http://www.climatecrisis.org/

predicted shift in wheat growing region
Predicted Shift in Wheat-Growing Region

International Maize and Wheat Improvement Center

compare co 2 emissions for

2007 Toyota Prius

Mileage:

60 mpg (city), 51 mpg (hway)

Distance:

12,000 miles per year

Fuel use:

216 gallons per year

Emissions:

4,226 lbs CO2 per year

Compare CO2 emissions for…

http://www.terrapass.com/

2007 Honda Odyssey

Mileage:

18 mpg (city), 25 mpg (hway)

Distance:

12,000 miles per year

Fuel use:

558 gallons per year

Emissions:

10,917 lbs CO2 per year

renewable energy does not run out or pollute
Renewable Energy: Does Not Run Out or Pollute

Sources of U.S. electric power 1997

find your place in a sustainable future

Find Your Place in a Sustainable Future

Think Dennis the Menace

Use compact fluorescent lights (60% less E)

Plant trees (Vatican Climate Forest offset 2007)

Reduce – Reuse – Recycle

Use less hot water, less heat, less heat-drying

http://www.blackle.com/

don t ask demand change

“I believe that this nation should commit itself to achieving the goal, before this decade is out, of landing a man on the moon and returning him safely to the earth.”

 President John F. Kennedy, May 25, 1961

Don’t Ask – DEMAND CHANGE

“And I’m confident that America will fulfill the commitments that we have made: cutting our emissions in the range of 17 percent by 2020, and by more than 80 percent by 2050 in line with final legislation.”

 President Barach Obama, December 18, 2009 (Copenhagen)

ad