Professor Yash Pal of India has won the annual Kalinga Prize for the popularisation of science along with a Vietnamese professor, a Tunisian expert in water management and the organisation responsible for Spain's national park system.

Koiro Matsuura, director-general of the UN Educational, Scientific and Cultural Organisation (Unesco), presented the prizes in Budapest, Hungary, where the three-day World Science Forum has opened, the UN news centre said in a statement.