Bhutan is studying plans to fund a potential $22.5 billion buildout of hydropower generation capacity with a mix of blended finance and green bonds, as the Himalayan nation seeks to revive its floundering economy. Nestled between India and China, the nation of less than 800,000 people wants to add a further 15 gigawatts of hydro capacity by 2040, said Ujjwal Deep Dahal, chief executive officer.