Ukraine - Chernobyl May be Closed By Year 2000

What is the initial question posed in the video?

• Why is it important?

• Which one?

• How does it work?

• What is the solution?

What is the problem number discussed in the video?

• 490

• 456

• 789

• 123

What is the context of the problem number mentioned?

• It is a math problem.

• It is a science experiment.

• It is a historical event.

• It is a literature review.