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Transcript
Ecological Footprint Objectives: to be able to explain the concept of an ecological footprint to begin to evaluate ecological footprints as a model for assessing the demands of a population on the environment to calculate ecological footprint from data to describe and explain the difference in ecological footprint between MEDCs and LEDCs Ecological Footprint – what do you already know? What is the IB definition for Ecological Footprint? In groups, discuss what do you think would need to be measured in order to determine the ecological footprint of the Czech Republic? How could this be done? Evaluate how accurate and useful this data might be How do you think ecological footprint is connected to the development of a country? What exactly therefore is an ecological footprint? http://www.earthday.org/footprintfaq Use this website to explore the concept of an ecological footprint and to think about how accurate they are. Answer the questions below and calculate the ecological footprint (Use your text & the help sheet) Data for food consumption are often given in grain equivalents, so that a population with a meat rich diet would tend to consume a higher grain equivalent than a population that feeds directly on grain. Why is this? Table to compare grain productivity and CO2 consumption for two global regions Population from Per capita grain consumption kg yr-1 Local grain productivity kg ha-1 yr-1 Africa North America 300 600 6000 300 Per capita CO2 emissions from fossil fuels Kg C yr-1 200 1500 Net CO2 fixation by local vegetation Kg C ha-1 yr-1 6000 3000 1. What does the high per capita grain production in North America suggest about the diet? 2. What does the loca grain productivity suggest about the two farming methods in use? 3. Which population is more dependent on fossil fuels? Explain. 4. What is meant by carbon dioxide fixation? 5. Why is there a difference in the net carbon dioxide fixation of the two regions? 6. Calculate the per capita ecological footprint (food land and carbon dioxide consumption only) for each region. 7. State two differences you would expect between the ecological footprint of a city in an LEDC and a city in an MEDC. 8. It has been calculated that the ecological footprint Singapore is 264 times greater than the area of Singapore. Explain what this means. 9. Assume that in a large city with a stable population, the proportion of the population that has a vegetarian diet increases. Explain how this change might affect the city’s ecological footprint.