Japan starts putting radioactive water from the Fukushima nuclear power plant in the sea.
Scientists treat the water. They say that the water is safe now. But the radioactive isotope tritium is still in the water. It is too difficult to take out.
People in South Korea protest. They worry about a bad impact on fishing. More than 50,000 people meet in South Korea’s capital. They ask the government to do something. But the government says that the water is not dangerous for fish.
Difficult words: radioactive (producing strong and dangerous energy which comes from the breaking up of atoms), nuclear power plant (a factory which makes electricity by breaking small things called atoms), isotope (a different form of the same element).
You can watch the original video in the Level 3 section.