kunthea continues to post videos of her investigations online and she says the risks are worth it.his continue to happen to cambodia, to cambodian people, and to our next generation ever again. when i feel tired sometimes, once i meet people, young people from the community always encourage me and that motivates me to keep going. around 60 million tonnes of sand a year is dredged from the mekong, according to research by newcastle university. this is unsustainable, they add. where i'm standing was actually once the river but they've not just used this sand to create a new island, they've built office blocks, condos, skyscrapers. even the windows will need sand. but cambodia is not alone in its insatiable desire for sand. it is the world's most mined mineral. the problem here is they are dredging at an already fragile ecosystem that scientists fear is on the edge of irreversible collapse. the mekong is called "the mother of water" in the many languages spoken along its banks. for centuries, through war and peace, she has been a one true constant. it may never be that way again. huma