My dream is to travel the world.

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

This is the worst situation.

This is the worst situation.

I think this is the best movie in history.

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

He was in a traffic accident yesterday.

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

Nuclear power is one of the renewable energies.

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