Nature & Environment
Environment: understanding atmospheric and ocean flows
...base metals like lead). Notice that the vertical axis of the lead production graph in Figure 11(a) is a logarithmic scale. Each successive tick mark up the axis has a value ten times bigger than the previous one. For example, 100 is equal to 1, 102 is equal to 100, and the tick mark between them is 101 (i.e. 10). A logarithmic axis enables changes over a large range to be...