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How human activities impact the Earth's ecosystems II. http://ian.umces.edu/blog/2013/02/12/managing-for-sustainable-ecosystems-our-human-role/. Bell ringer activity. Have you heard of the ozone layer? Write down what you think causes the ozone layer depletion.
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How human activities impact the Earth's ecosystems II http://ian.umces.edu/blog/2013/02/12/managing-for-sustainable-ecosystems-our-human-role/
Bell ringer activity • Have you heard of the ozone layer? Write down what you think causes the ozone layer depletion. chemicals :chlorofluorocarbon (CFC)
4. Ozone layer depletion con’t • The ozone layer protects people from UV light. (Especially, UVB light) http://www.epa.gov/ozone/science/sc_fact.html http://www.epa.gov/ozone/science/q_a.html
4. Ozone layer depletion con’t • Ozone -Blue -Has a strong odor.
4. Ozone layer depletion con’t • Chlorofluorocarbons (CFCs) are chemicals that were used in aerosol cans, refrigerators, etc. • When CFCs and other pollutants are broken down by UV light, they damage the ozone layer.
4. Ozone layer depletion con’t • Ozone hole over Antarctica • More UVB light can cause skin cancer and other harmful effects on some organisms.
4. Ozone layer depletion con’t • Many countries banned or reduced the production of CFCs. • The ozone layer will be recovered in about 50 years. http://www.epa.gov/ozone/science/sc_fact.html
Video: ozone layer depletion (Fill out the handout.) • http://www.youtube.com/watch?v=6QyI3Yo1sf4
5. Energy consumption http://www.eia.gov/forecasts/ieo/world.cfm 1 Btu = 1055 joules
5. Energy consumption con’t http://www.eia.gov/forecasts/ieo/world.cfm
5. Energy consumption: fossil fuels • (Thaddeus, 2010)
Possible solutions to the problems with fossil fuels • Nuclear energy • Renewable energy -Solar energy -wind energy -Geothermal -Bioethanol • Reducing energy consumption, etc. • (Thaddeus, 2010)
Possible solutions to the problems with fossil fuels • All the possible alternate energy sources have advantages and disadvantages. • More countries try to switch to alternative energy sources.
Fuel Mix for U.S. Electricity Generation http://www.epa.gov/cleanenergy/energy-and-you/index.html
Video: Japan’s wind power • http://www.cnn.com/video/?/video/world/2013/03/11/zolbert-japan-wind-power.cnn
Group activity • Work in groups of four. • Write down every vocabulary word we have learned in this unit: one word on each sticky note. • Make a big concept map using the words. • Each group will present its concept map.
