The United Nations Environment Programme is providing solutions to global environmental problems.

His son was born with clubfoot.

In geomorphology, an antidune is a special type of sand dune that forms on the downstream side of a water flow.

He started walking around the room in an anticlockwise direction.

Retroflex sounds are difficult to pronounce.

He deeply studied the history of anti-Semitism.

He learned how to operate the anti-tank gun.

We should always remember the power of Kannon in difficult times.

It is important to distance yourself from antisocial forces.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.