Archana and her father came out of the Chennai airport into what looked like a scene from an action movie. It was raining, but she could sense when the plane touched down. Now, at the airport, the cars stood honking one behind the other. Sridhar uncle was waiting in the car. They all got in and joined the long queue of cars waiting to enter the dark brown stream that formed the road out of the airport.

The beautiful and healthy lotus stems—you can find these stems being sold by roadside vendors, especially along roads that run by a river or a pond. The light brown or white, sausage-like tubular vegetable has holes in it. These are lotus stems and they are used widely in Indian, Chinese and Japanese cuisine. They are relished for their taste and nutritional value. Known in Hindi as bhe or kamal kakri, the lotus stem contains hollow air channels that run the length of the stem. It is crunchy, sweet and tastes like water chestnut. It has a delicate flavour and is suitable for eating raw or cooked...

They are known to have cradled civilisations, all over the world. They bathed, fed and helped carry humans. What are we talking about? Rivers, of course! With a twist to their modern profile, though, today they also serve as water suppliers for grand industries…

The inability to provide safe drinking water to communities features at the very top of our list of developmental failures, with the disastrous consequence of high mortality rates. In 1996, the World Health Organisation (WHO) stated that each year, more than five million human beings died from illnesses linked to unsafe drinking water. It is further estimated that, by 2020, 135 million people will die from water-related diseases unless they are not only provided adequate water but access to clean drinking water.