In contrast, the share of renewables as a fraction of TPES remained at 3 per cent in high income countries and 46-45 per cent in low income economies. Renewable energy sources now account for the majority of TPES in Nepal (84 per cent), Myanmar (75 per cent), Cambodia (72 per cent),Tajikistan (64 per cent) and Sri Lanka (53 percent). However, there is no uniform definition of renewable energy (Box 1), and large hydropower plants can have undesirable environmental and social impacts.