The pie chart below shows the main reasons why agricultural land becomes less productive. The table shows how these causes affected three regions of the world during the 1990s.
Summarise the information by selectng and reporting the main features, and make comparisons where relevant.
The chart below shows the number of households in the US by their annual income in 2007, 2011, and 2015.
Summarize the information by selectng and reporting the man features, and makee comparisons where relevant.