The two pie charts illustrate the percentage of water used by different sectors in Sydney, Australia in 1997 and 2007.

According to the chart, 48% of water consumption was used in the food industry in Sydney in 1997, which made up the largest source of water consumption. It was followed by the water used in household and manufacturing industry at 19% and 15% respectively. The building industry used the least amount of water at 5%.

Compared with the water use in 1997, the year of 2007 witnessed a change in the percentage of water use in different sectors. The most noticeable change happened in the service industry, which doubled to 25%. The water used in the food industry, household and manufacturing industry has all declined whereas the water consumption in the building industry showed slight improvement.

In conclusion, the food industry remained the top one industry in the percentage of water consumption whereas the building industry is the opposite. In addition, the service industry witnessed the largest increase in the water consumption.