Examples: a dark horse - a brown- or black-haired horse; a candidate who is unexpectedly nominated at a political convention
a fair child - a child that has light hair and skin; a child who is honest and even-handed in play

1. cold wave
2. a fair day
3. a fine box

Due to its energy consumption, desalinating sea water is generally more costly than fresh water from surface water or groundwater, water recycling and water conservation. However, these alternatives are not always available and depletion of reserves is a critical problem worldwide.[5][6] Desalination processes are usually driven by either thermal (in the case of distillation) or electrical (in the case of reverse osmosis) as the primary energy types.

Explanation: