The Caspian Sea has enabled Iran and Russia to supply each other with weapons and trade goods despite western sanctions.

The government promises joined‑up and long‑term regional planning for water. But some pressing challenges appear to receive surprisingly little attention.

Science can only change the world when societies decide to give it the means to do so.

Circular economies don’t follow the ‘take, make and dispose’ model but try to keep products in use for as long as possible by reusing and recycling them.