Question

which of the following facts indicates that water usage is a global problem? dubai is located in the middle east and uses more water per person per day than any other place in the world. to get their water, residents purify seawater in a process that releases tons of carbon, a greenhouse gas, into the atmosphere for every million gallons of water produced. a. sea water is purified. b. dubais residents use more water than anyone else in the world. c. dubai is in the middle east. d. the process of purification causes greenhouse gas emissions.

Explanation:

• Option A: Sea - water purification itself is not an indication of a global problem. It is just a method of obtaining water.
• Option B: Dubai's high water usage per person is a local (or regional) fact related to Dubai, not a global problem indicator.
• Option C: Dubai's location in the Middle East is a geographical fact and has no direct relation to water usage being a global problem.
• Option D: Greenhouse gas emissions from the water - purification process (which is related to water usage) is a global issue. Greenhouse gases contribute to climate change, which is a global problem.

Answer:

D. The process of purification causes greenhouse gas emissions.