The given line graph illustrates changes in the consumption of water worldwide between 1900 and 2000, while the table compares population, irrigated land and per-capita water consumption in Brazil and the Democratic Republic of Congo in 2000.
It is obvious that total worldwide water use experienced an upward trend over the period with agriculture consistently being the dominant sector. Additionally, water consumption was substantially higher in Brazil than in Congo, corresponding to its larger population and greater area of irrigated land.
Looking first at the line graph, agriculture accounted for the largest amount of water use throughout the period. The figure for this sector stood at 500 km3 in 1900, before rising dramatically to 3000 km3 in 2000. A similar upward trend was recorded in the other two sectors namely, industrial and domestic use, but at a much lower level. During the first few decades, water use in these two sectors remained relatively similar, at just under 100 km3, then industrial water use increased noticeably to nearly 1200 km3 in 2000 and the figure for domestic consumption experienced a slight rise to 400 km2, remaining the smallest sector throughout.
Turning to the given table, all figures of Brazil were much higher compared to Congo in 2000. Brazil had a population of 176 million, far exceeding the figure for Congo, which had only 5.2 million people. Similarly, the area of irrigated land in Brazil was 265 times as large as that in Congo, at 26.500 km2 and 100 km2, respectively. Likewise, there was a wide disparity in per-capita water consumption between the two countries, with Brazil recording 359 m3 which was 45 times the figure of Congo, at just 8m3.