Heavy pollution in the Mekong river has pushed freshwater dolphins in Cambodia and Laos to the brink of extinction, the
World Wide Fund For Nature (WWF) has said. Reported by the BBC, WWF said that only 64 to 76 dolphins remain in the
High toxic levels of pesticides, mercury and other pollutants have been found in more than 50 calves that have died since
2003. The group said it was investigating how contamination had entered the Mekong, and has called for a cross-border plan to
help the dolphins survive.