NEW DELHI:G20 economies would need to invest about an estimated $35 trillion this decade, over and above the current spending, to be on track to reach net zero greenhouse gas emissions by 2050, a study by McKinsey said.“While G20 economies have made tangible progress in reducing emissions in recent years, CO2 emissions still need to further decrease almost 50% by 2030 versus 2020 levels to reach net zero goal on time.To achieve that goal, much of the investment needed for the transition to a low-emissions economy would need...