1) ONGC focuses on sustainable development through carbon and energy management, water management, waste management, low carbon/renewable energy projects, and capacity building. 2) Specific areas discussed include developing a carbon footprint and identifying mitigation opportunities, optimizing energy use, implementing water conservation and reuse projects, studying thermal destruction and conversion of waste, and exploring uses for agricultural and CO2 waste. 3) ONGC publishes annual sustainability reports and is interested in collaborating in areas like desalination, waste reuse, CO2 conversion, renewables, and new energy technologies.