CNN-IBN: Whether its cyclones, floods or sea level rises, Mangroves protect coastlines. They have in the past, prevented entires cities from being washed out. As countires realise the importance of these coastal forests, an 11-year-old boy is busy spreading the green message in Mumbai. July 26 2005 is a day that Mumbai will never forget. When heavy rains lashed the metropolis, the city was flooded and nothing came in the way of the rain except the Mangroves. And our Madhav knows …