The data tabulated in Figs. 3 and 4 permit a comparative investigation between, without and with usage and disposal options according to the existing consumer behaviour and government policies in China, Hong Kong and India. In all the cases, the carbon footprint values are less than those of the without usage and disposal options. When the comparison is made between the options from three countries under discussion here, one can see that for plastic bags, the carbon footprint values from India is less compared to other countries.