New Delhi, Dec. 29 -- The intense global discussion surrounding the Aravalli hills should take a key point into consideration: habitat fragmentation, a term used to describe how ecosystems are fractured by introducing new and alien activities -- roads, ecotourism infrastructure, plantations, farming, mining or just urbanisation. These developments mean native vegetation, pollution barriers, corridors for wildlife movement and hydrological systems are disrupted. Nature doesn't do well when it is fragmented. It is also unable to protect our well-being when it is under attack. Hence, discussions around how to measure the hills -- landforms that rise at least 100 metres above the surrounding ground qualify as Aravallis -- are not scientifically...