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Perched among the highlands of western Cameroon,
bordered by green mountains and cliff laces, Lake Nyos is a scene of
breathtaking beauty. But the picture cannot be{{U}} (36) {{/U}}. A
detailed study reveals that the lake could release a{{U}} (37)
{{/U}}cloud of carbon dioxide, capable of wiping out entire communities
around its shores.
Tile warning, from a team of scientists,
comes nearly 20 years after the lake{{U}} (38) {{/U}}an estimated 80m
cubic metres of CO2 into the atmosphere. Heavier than air, the cloud
of gas rolled down, {{U}} (39) {{/U}}hillsides and villages. Silent and
invisible, it{{U}} (40) {{/U}}the air of oxygen, killing hundreds of
cattle and claiming the lives of more than 1,700 people up to 26km away. "It was
one of the most mysterious{{U}} (41) {{/U}}scientists have ever
investigated," said George Kling, an ecologist at the University of
Michigan.
Researchers called in after the 1986{{U}} (42
