The line graphs illustrate global water usage across three sectors: agriculture, industrial use, and domestic use, from 1900 to 2000. Water consumption is measured in cubic kilometers (km³). Additionally, the accompanying table presents the water consumption figures for Brazil and the Democratic Republic of Congo in the year 2000.
According to the line graph, water usage in 1900 was 500 km³, with industrial and domestic use being almost negligible. By 1950, the agricultural sector significantly increased its water usage to 1,000 km³, while the other two sectors accounted for only 100 to 200 km³. After 1950, all three sectors experienced a remarkable rise in water consumption. By 2000, agricultural use soared to 3,000 km³, in contrast to approximately 700 km³ used by the industrial sector and just 200 km³ for domestic purposes, which represented the lowest proportion.
The water consumption data presented in the table highlights differences between Brazil and the Democratic Republic of Congo. Brazil had the highest overall water consumption, fueled by its large population of 176 million. It consumed 26,500 km³ for irrigation and approximately 359 m³ per person. Conversely, the Democratic Republic of Congo had the lowest water consumption figures, utilizing only 100 m² for cultivated land and 8 m³ per person, with a population of 5.2 million.