Which of the following issues is not a factor in increasing pollution levels in crowded cities? a. home heating and fireplaces b. water conservation c. vehicle emissions d. industrial pollution

Match the graph type to its description. 1. uses symbols to describe information pie 2. compares different quantities at the same point in time line 3. compares increases and decreases in a quantity over a period of time bar 4. shows the relationship of parts to each other and to the whole pictograph