In reply to the letter by Robert G. Coenen on the option of geothermal energy, this is indeed a cost-efficient way to generate electric power, provided that there is a geothermal resource. Drilling a well and testing the temperatures deep underground is the only way to determine whether such a geothermal reservoir exists in Malta, i.e. at least 10,000 feet to find a layer hot enough to boil water. If the budget is available, this test could be done.
Meanwhile, solar electric systems, once installed, have no "cleaning and maintenance" or "dust and salt" issues and are extremely reliable.
The sun shines in Malta nearly every day and when it does megawatts of power can be stored, as is now being done by the American Electric Power utility in the US State of Ohio, using newly developed RE storage technologies permitting 24-hour dispatchable solar electric power.