Natural gas-rich Turkmenistan wants to join a regional green-energy trend. Officials have announced that construction of an energy-efficient power plant on the Caspian shoreline is underway, adding that the facility aims to produce enough electricity to meet domestic needs and export excess power westward. Turkmen Energy Minister Annageldi Saparov, speaking at an economic forum on November 3, revealed that a combined-cycle power plant with a projected annual generating capacity of almost 1.6 gigawatts is in the works at…