Ten ecosystems in Pakistan -- ranging from the Himalaya region in the north to the Indus delta in the south -- are under immense pressure and can be termed as critically threatened. This was stated by World Wide Fund for Nature's conservation director Ashiq Ahmad at a workshop on Ecology and Environment held in Karachi recently. He said that the ill-planned and haphazard use of the country's natural resources and population explosion were among the major causes for the damage being caused to the ecosystems.