Line Graphs

The line graphs below show the forest coverage and air pollutant concentration in Region A from \(2008\) to \(2022\).

1. Find the year with the greatest decrease in percentage points in forest coverage in Region A. Hence find the decrease in percentage points in forest coverage this year.
2. Find the overall percentage increase in air pollutant concentration in Region A from \(2008\) to \(2022\), correcting your answer to \(3\) significant figures.
3. The local government of Region A launched the ‘Forest Restoration’ operation. State in which year the government most likely started this operation and briefly explain the reason.
4. State one advantage and one disadvantage, respectively, of the drawing of the graphs above, where the vertical axes do not start from zero.