The soaring concentration of radioactivity in northern Europe is thought to have come from a troubled nuclear power plant in western Russia.
A monitoring station of the Vietnam Atomic Energy Institute yesterday discovered radioactive concentrations in leaves in Hanoi, in small amounts, do not affect human health.
The level of radionuclides in radioactive clouds to Southeast Asia may increase by about 10 times in the coming days.
In the Atlantic Ocean, radioactive clouds continue to spread east to Europe and North Africa.
The monitoring station in Hanoi has detected radioactivity in the air. However, the analytical results show that it is only a very small content, does not affect human health.