Cameroon : Action needed on deadly lakes

More work is needed urgently to prevent potentially fatal releases of gas from two lakes in Cameroon, scientists say. Lakes Nyos and Monoun contain high concentrations of dissolved carbon dioxide. In the 1980s, thousands died when the gas was suddenly released. Pipes have been installed to remove CO2 from the bottom of the lakes, but new research shows they are not enough. Scientists warn more pipes must be put in place to avert the danger of further catastrophic releases of gas. "With one pipe in each lake, we are currently removing more gas than comes in each year," said George Kling, from the University of Michigan, US.