Aim: This paper provides the economics of Virtual Water (VW) exporting to other countries through major agricultural commodities from India. Virtual Water is interconnected with food sustainability and it is the amount of hidden water transferred to other countries through trade. India produces and exports high water-consuming products but contains only 2.56 per cent of total water available in our world. By analysing VW, the total VW export from and import to India and the comparative advantage in producing the commodity in India can be obtained. Methodology: VW for major crops is estimated by dividing the total water required or applied for the specified crop by the total yield of the crop. In this paper, we computed the virtual water trade for the major crops in India and analysed the comparative advantage for India in producing the crop. The data required for the analysis are collected from various secondary sources like the Directorate of Economics and Statistics (DES, GoI), Indian Agricultural Statistical Research Institute (IASRI), EXIM Bank, and FAO Aqua Stat. Results: In the years 2018-19 and 2017-18, India exported 34515 MCM and 41080 MCM of VW through rice followed by 420 MCM and 622 MCM of VW through Wheat, 276 MCM and 184 MCM of VW through Maize. When comparing the production of rice and groundnut in China and India in water requirement aspect, India has the comparative advantage in the production of groundnut and china has the comparative advantage in the production of rice and also shows the same in the yield aspect. Conclusion: With the growing water scarcity in India, we should shift the focus from the high-water requirement crop to the lower crop. In the end, we sort out the water scarcity problem and can attain sustainability.

Aim: The vast range of weather conditions in India's climate system is a result of numerous reasons, including growing agricultural activity, altered land use patterns that increased emissions of methane and nitrous oxide as well as other greenhouse gases, automobile use, and so forth. It is necessary to quantify the significant and under-estimated impact of climate change on the natural system through changes in extreme weather. To account for the economic losses of the environment as a result of climate change, the Green GDP concept was introduced. The objective of the paper is to compute the Green GDP for India and test the effect of economic openness on GDP and Green GDP. Methodology: The World Bank Database, the OECD, and Energy Statistics India 2021 are some of the sources from which information was gathered. Growth Rate, Economic Openness Index and the Green GDP estimation methods are employed. To compute the Green GDP indicator for the years 2011 to 20, the GDP measure is subtracted from the costs associated with the utilization of natural resources and environmental degradation. Results:  According to the outcome, the cost of environmental damage will decline from 11 per cent in 2011 to 9 per cent in 2020. The cost of environmental damage growth rate was -3.07 percent. The Economic Openness Index was 55.62 in the year 2011 and it is gradually declining and attained 36.46 in the year 2020. The lower the index, the lower the impact of trade on domestic activities and the less powerful the economy of that country. The relationship between economic openness and Green GDP per capita shows that less and less economic openness moves the cost of environmental damage to the increasing side. Conclusion: The cost of environmental damage increased in the year 2020 compared to 2011 but the growth rate shows negative. The government should take several initiatives to assure data availability and accountability to estimate the environmental damage cost and to frame suitable policy options to improve economic performance overall.

The world is attempting to increase water efficiency in all activities, especially in irrigation, which consumes three-fourths of total available water. Concerning  the near future food demand and sustainability issues, views are directed to reduce the usage of water or increase the efficiency of water use. India is a major contributor to the agricultural production and food supply to many countries. Irrigated agriculture is being followed by the many farmers in India which consumes huge amounts of water. Considering the monsoon failure and   increased   water demand, one must find  solutions for retaining  water in an available manner. The focus is on finding major water-consuming crops and irrigation methods under different irrigation environments of Tamil Nadu. Pudukottai, Salem and Erode are the districts of Tamil Nadu state selected as a study area. In each district, blocks, villages and respondents are selected through multi-stage random sampling. This study is entirely based on primary data which is collected using a well-structured interview schedule. The collected data is used to estimate the Physical Water Productivity (PWP) and Economic Water Productivity (EWP). The results show that PWP and EWP are  variable across crops under different irrigation environments. In a tank environment, the alternate drying and wetting method of irrigation in paddy is effective and saves around 39 per cent of water compared to the conventional method  by flooding. For Groundnut crops, drip irrigation is more effective than check basins which are better than the flood irrigation method.   We can conclude that the farmers should follow water-saving irrigation methods/technologies and cultivate   crops that show less demand for water  during the   season when the water is scarce and  turn to   cultivation of  crops like sugarcane and banana in water surplus season.