Group+1+-+Consumption+of+Raw+Materials+in+the+U.S.

Instructions 1. Review the graph below. Read the title, and the labels on the x and y axes. Review the key or legend. 2. Use the "Discussions" tab to write a short summary explaining what this graph shows. What information is important? Why is it important? What conclusions can you reach from the data presented in this graph? 3. Meet with other students in your group who have reviewed the same graph. As a group, prepare to present the graph to the class. In your presentation you should include the following:


 * an explanation of what the graph shows
 * two things you have learned from the graph
 * a connection to science, technology. Why is this information important or what should we do with it?



Raw material demand trends The global consumption of key raw materials is rising fast. Over the 20-year period ending in 1994, the world population increased by 40% – in that same period, the world consumption of cement increased by 77%, and plastics by just under 200%… Among raw materials used for construction, only crude steel registered a growth rate that was significantly lower (only 3% from 1974 to 1994) than the rate of population increase. (University of Minnesota, 1999).