The Mekong River and its tributaries are Southeast Asia's main waterway flowing through China, Myanmar, Laos, Thailand, Cambodia and Vietnam.<br /><br />There are a number of dams built in the upper Mekong basin, including five in China, to generate electricity. But a second dam on river Sesan, a tributary of Mekong, is threatening the livelihood of people in Ratanakiri area of Cambodia.<br /><br />Activists say the dam will flood more than 30,000 hectares of farmland, forcing around 5,000 people to relocate and severely affect fishermen across the Mekong basin.<br /><br />The government says it has conducted all the relevant environmental surveys and believes the positive impacts outweigh the negative.<br /><br />Al Jazeera's Stephanie Scawen reports from Ratanakiri.
