The Yen Bai province environmental authority has taken samples of the Red River for testing and advised locals to limit their direct use of the river water.
Denmark is to give Vietnam USD8 million for scientific study over the next three years as part of an agreement to be ratified by the two nations today.
Salt water intrusion in coastal provinces in the Mekong Delta has occurred earlier this year than previous years, affecting thousands of hectares of rice.
Vietnam should quickly prepare a strategy for moving toward a “low carbon” economy to cushion the negative impacts of climate change, said an environmental official.