THIS is in reply to 'Small actions can have an enormous green impact' (GDN, May 13), stating that "I used to wonder how turning off the lights or the tap would have a significant impact on decreasing air pollution and CO2 emissions." Similar wonder was made by Dr F Batmanghelidj who used the water miracle to turn a dehydrated patient into a healthy person. He says, "You're not sick; you're thirsty. Don't treat thirst with medication."

I have seen drinking water completely reverses conditions such as asthma, angina, hypertension, migraine headaches, arthritis pain, back pain, colitis pain, chronic constipation, heartburn and hiatal hernia, depression, chronic fatigue syndrome, high cholesterol, morning sickness, overweight problems and even heart problems needing bypass surgery.

Dr F Batmanghelidj of the US cured chronic diseases by water+salt formula. I wondered how drinking three litres of water a day would have a significant impact on reducing chronic diseases. You must learn to rehydrate your body gradually and carefully. You need to recognise your own particular early indicators of thirst. Not everyone is the same. You must learn what can happen to your body when it becomes dehydrated.

Not everybody registers drought in the same way. Depending on where the drought has settled, the initial indicators are different in different people. Somebody has pain in the stomach or headache means dehydration, nature calls indicate that he is thirsty. His body is dehydrated and needs drinking water to cure diseases.

Dr F Batmanghelidj invented the cheapest drug "water" not only for the poorest patients but also for the entire world, and saved the lives of billions using the most economical method.

Dr Visal A Khan