Indo-Asian News Service: People in six cities of India – five of them on the coast – will hold marches on Saturday to campaign against climate change that threatens to drown parts of their cities. The citizens of Mumbai, Panaji, Kochi, Chennai, Puri and Kolkata will gather on their favourite beaches (riverside in case of Kolkata) to raise people’s awareness about climate change that will raise temperatures globally, and see some of these spots vanish as sea levels rise. According to experts, overpopulated …