What are engineers trying to achieve?
Many countries in dry regions rely on desalination, the process of removing salt from seawater, to supply their drinking water. In one common method, seawater is forced through very fine membranes that hold back the salt, a process known as reverse osmosis. The technology is effective, but it requires a large amount of energy, and the concentrated salty water left over must be released carefully so that it does not harm marine life. Engineers are therefore working on plants powered by solar energy and on membranes that need less pressure, hoping to make desalinated water cheaper and kinder to the environment.
Answer and explanation
Correct answer: C. Cheaper desalinated water that is better for the environment
- Step 1: They aim to make water cheaper and kinder to the environment.
Answer
Cheaper desalinated water that is better for the environment.
Why not the others: Water that tastes of salt, Plants that use more electricity but produce less fresh water and Membranes that need more pressure do not fit.
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