1.   A group of leading biologists reckon the Chalillo dam would destroy an area of rainforest containing rare and threatened species.

2.   Critics say the dam will destroy cultural sites and habitats of endangered species.

3.   While developing countries focus on the benefits of their dams, environmental groups and some development specialists say big dams destroy communities and wreak havoc on the environment.

4.   Its opponents say the new dam will destroy the natural heritage in the region.