Answer:
2048 is when the arable land is likely to run out for the human population.
Explanation:
Using standard observation techniques, one can observe that when the curve cuts the y axis at 4.00 billion hectares, the curve cuts the x axis at a few spaces before the line labelling 2050. Using a method of linear extrapolation, we can measure the distance of these spaces and deduce that the difference corresponds to 2 years. This number of 2 years when subtracted from 2050 results in the year 2048 at which arable land is expected to run out.