US (thermal energy). The Indian government has taken steps to enhance power generation from gas-based power plants by waiving import duties and taxes. Gasification of coal or lignite or pet coke or biomass produces synthetic natural gas or syngas (also known as coal gas or wood gas) which is a mixture of hydrogen, carbon monoxide and carbon dioxide gases. Coal gas can be converted into synthetic natural gas by using the Fischer–Tropsch process at low pressure and high temperature. Coal gas can also be produced by underground coal gasification if the coal deposits are located deep in the ground or it is uneconomical to mine the coal. Synthetic natural gas production technologies promise to dramatically improve India's supply of natural gas. The Dankuni coal complex produces syngas that is piped to industrial users in Calcutta. Many coal-based fertiliser plants can also be economically retrofitted to produce synthetic natural gas. It is estimated that the production cost for syngas could be below US. Earlier, natural gas use in power generation was thought to be a bridge fuel as it emits far less CO2 (below 50%) when compared to coal use in power generation until renewable power generation without CO2 emissions become economical. Renewable power generation is already cheaper than coal and gas fueled power generation in India. Now the bridge fuel concept is no more valid and existing gas-based generation needs to compete with the coal-based generation when there is no adequate renewable power generation (including storage and peaking type hydropower). The problem of stranded assets/capacity is more deep-rooted for gas-based power plants than that of the coal-based power plants as coal is far cheaper than natural gas in India. Nuclear power As of 31 March 2022, India had 6.78 GW of installed nuclear power generation capacity or nearly 1.7% of the total installed utility power generation capacity. Nuclear plants generated 47,063 million kWh at 79.24% PLF in 2021–22. India's nuclear power plant development began in 1964. India signed an agreement with General Electric (United States) for the construction and commissioning of two boiling water reactors at Tarapur. In 1967, this effort was placed under India's Department of Atomic Energy. In 1971, India set up its first pressurized heavy water reactors with Canadian collaboration in Rajasthan. In 1987, India created the Nuclear Power Corporation of India Limited to commercialize nuclear power. The Nuclear Power Corporation of India is a public sector