To answer your question accurately, I would need to see the chart mentioned on page 15 of "The New Normal," which shows the number of fires that burned 1,000 acres or more during the specified years. However, since I don't have access to that chart or the specific data it contains, I can't determine the exact difference in the number of fires between the two time periods.
If you have the numbers from the chart for the average number of fires per year for both time periods (2000-2012 and 1990-1999), you can find the difference by subtracting the average from the earlier period from the average of the later period. Then, you can choose your answer from the provided options (160, 90, 250, or 410). If you can provide those numbers, I can help you with the calculation!