A child wearing a mask holds onto the motorbike rider while travelling in Hanoi July 16, 2007. Research shows Vietnam is a "biodiversity hotspot" with ecosystems under threat. Less than 25 percent of coral reefs surveyed have living coral and 75 percent are at high or very high risk, eight times the southeast Asian average. To match feature VIETNAM-ENVIRONMENT/
REUTERS/KIM KYUNG-HOON