He is interested in the history of the Old World.

His grandfather fought in the Second World War.

The charm of his novel is its unique worldview.

His worldview is very unique, always providing a new perspective.

A nuclear submarine can travel underwater for a long time.

Nuclear power plants are an important source of energy supply.

The International Atomic Energy Agency is an international organization that promotes the peaceful use of nuclear energy.

New World monkeys live in South America.

The World Health Organization is working to improve public health worldwide.

The World Trade Organization is an important organization that sets the rules for international trade.