A year 2020 research study (Athira and Agilan 2020 ) on the impact of climate change on rainfall over Chennai, predicted the intensity and the frequency of extreme rainfall over the city is likely to increase under RCP 4.5 (representative concentration pathways) and RCP 8.5 scenarios. When the efforts to curb emissions are medium, that is, with an increasing tendency to use renewable energy sources and a mix of transport methods (internal combustion engines, electric vehicles, bicycles), the scenario of RCP 4.5 sets in. Similarly, RCP 2.6 means high efforts to curb emissions, complete dependence on renewable energy sources/emission capture methods and a mass tendency to use bicycles and public transport. RCP 8.5 means the grim scenario of low efforts to curb emissions. It is predicted that an RCP 2.6 scenario would increase the global temperature by 1.0 degree celcius , the sea level by 0.4 meters, and cause very small increase in extreme weather conditions by 2081-2100 (re...