This paper discusses recent topics related indirectly to energy production and marketing and related highly to energy policy and economy. These topics are: (1) background to carbon taxes including environmental issues - global warming and CO2 emissions, fuel substitution and the encouragement of non-hydrocarbon fuel use; (2) climate-change convention and related conferences including those at Rio de Janeiro - objectives and achievements, and Kyoto-objectives; (3) carbon-tax proposals, including implications for oil, coal and gas: (4) The OECD view including evolution of general taxes on hydrocarbons, the carbon tax as a government revenue-raising objective, CO2 emissions in the OECD; (5) the oil-producer＇s view including discrimination against oil, the impact on the incentives to use oil and gas; (6) the developing countries＇ view, including the need to increase fuel use for industrialisation, financial constraints on energy use, and CO2 emissions in the developing countries.