Bhutan has high hopes to harness renewable energy, PM says The tiny Himalayan kingdom of Bhutan, known for pursuing a unique economic development model of "Gross National Happiness", which aims to balance spiritual and material wealth,signed a deal with Japanese auto giant Nissan Friday to become the ultimate showcase for electric cars, taking advantage of its abundance of hydropower. An exclusive AFP interview with Prime Minister Tshering Tobgay. Images and soundbites. /REFILING WITH CORRECTIONS/