Expert Opinion

Even where supplies are sufficient or plentiful, they are increasingly at risk from pollution and rising demand'
UN Secretary General, Kofi Annan

'The simple fact is that there is a limited amount of water on the planet and we cannot afford to keep treating it as if it will never run out'
International Atomic Agency director, Mohamed El-Baradei

'The regions worst affected by dry weather include the Thames valley, the East Midlands and East Anglia'
BBC News: Special Report

'Pumping groundwater is like making constant withdrawals from a bank account without ever paying anything into it.'
BBC environment correspondent Alex Kirby