Question

what is one disadvantage of desalination?
the process can utilize solar energy to lower its cost.
the process uses fuel that is expensive.
the process makes water that is unsafe to drink.
the process is too difficult to carry out in big cities.

Explanation:

• The first option is an advantage, not a disadvantage, as it reduces costs.
• Desalination processes (like reverse osmosis) are energy-intensive; if powered by costly fuel, this is a key disadvantage.
• Desalinated water is treated to be safe for drinking, so the third option is incorrect.
• Desalination plants are successfully operated in large cities (e.g., Dubai, Tampa), so the fourth option is incorrect.

Answer:

B. The process uses fuel that is expensive.