BIG STORY: In the biggest merger in the history of India Inc, mortgage firm HDFC Ltd will merge with HDFC Bank, creating a banking behemoth with a market capitalisation of Rs 14 lakh crore. Meanwhile, the Intergovernmental Panel on Climate Change (IPCC) said that if the world wanted to restrict temperature rise to within 1.5 degree Celsius from pre-industrial times, global greenhouse emissions needed to peak by 2025 “at the latest”