My dream is to travel the world.

I think this is the best movie in history.

The Chernobyl accident is considered the worst nuclear disaster in world history.

This is the worst situation.

This is the worst situation.

He was in a traffic accident yesterday.

This area has been hit by major disasters many times in the past.

He didn't think an incident would occur to him.

Nuclear power is one of the renewable energies.

We have a responsibility to make this world a better place.