INTRODUCTION
Fast-paced industrialization, accompanied by the indiscriminate burning of fossil fuels, has led to excessive emission of greenhouse gases over the past two centuries, resulting in the global warming being witnessed today[1]. According to the U.S. Environmental Protection Agency (USEPA), the total emission of greenhouse gases in the US alone during the year 2017 was 6,457 Million Metric Tons of Carbon di oxide (CO2) equivalent, as shown in Figure 1. As per the Intergovernmental Panel on Climate Change (IPCC), such emissions have to be reduced by 50 to 80% by the year 2050[2].