Scientists says glaciers in the Himalayas have shrunk by as much as a fifth in 30 years.
The findings, published by the International Centre for Integrated Mountain Development in Kathmandu, show Nepal's glaciers shrank by 21% and Bhutan's by 22% in that period.
The reports were issued at the UN climate talks in South Africa.
Three years of research funded by Sweden showed 10 glaciers surveyed in the region were shrinking, with a marked acceleration in loss of ice between 2002 - 2005.
Another study found a significant reduction in snow cover across the region in the last decade.
The research followed a discredited announcement by UN scientists in 2007 that the region's glaciers would be gone by 2035.