2Roger E. Jones English Teacher, Chengdu, Sichuan, China B.A., Northwestern UniversityM.A., University of MissouriTESOL, Univ. of California, Los AngelesFields of Study: Public Speaking, Writing, International Relations, Art History
3outline definitions issues pro / con an inconvenient truth practice debateconclusion
4global warmingnounan increase in the average temperature of the earth's atmosphere and oceans, especially a sustained increase sufficient to cause climatic change.
7WHAT IS GLOBAL WARMING?Temperatures are rising because we have dramatically increased the amount of carbon dioxide in the Earth’s atmosphere, by burning fossil fuels such as coal, gas, and oil, and by clearing forests.
8Greenhouse Gas: A gas which traps the sun's heat:
9Greenhouse Gas: A gas which traps the sun's heat: Water vapor (H2O)Carbon dioxide (CO2) - exhaust from cars and power plants.Methane (CH4) - from decomposing organic matter.
10Carbon dioxide and methane levels are at their highest levels in the past 420,000 years.
32From 1971 to 2005 CO2 vehicle emissions rose from 1 From 1971 to 2005 CO2 vehicle emissions rose from 1.8 billion tons per year to 4.6 billion tons per year.The average global air temperature rose between 0.5 and 0.74 degrees C during the past century.An average 2 degrees C warming is predicted by 2100.Sea level has risen between 10 to 25 cm in the last 100 years.
33The Earth is getting warmer. What causes the warming is hotly debated.
34The Argument: Human causes (Anthropogenic): Carbon dioxide (CO2) exhaust from cars and power plants.Methane gas from wasteDeforestation
35The Argument: Natural causes: Some claim the sun is getting hotter. Also, the earth goes through natural cycles of climate change.
36Evidence that CO2 is Cause carbon dioxide vs. global temperature graph