There has been less rain than usual in the southeast of England for several years.         

But there are more people living there, each using more water than ever.                                      

So Southern Water are asking people to use water wisely.

H2knOw sets a challenge to students - to create a presentation or leaflet that explains the problem and suggests ways we can all use water wisely.

The H2knOw site contains images, data and documents to explore and use - plus there's the chance to see other student's presentations.