The reduction of greenhouse gases (to which CO2 contributes over 60%) to stop global warming is now a major priority for governments around the world. One approach, described in this paper, concerns the ‘‘clean energy’’ or ‘‘zero-emission’’ technologies. An original concept of a semi-closed zero emission ion transport membrane oxygen power (ZEITMOP) cycle is being developed. It can be compared to other research initiatives such as clean energy systems and zero-emission natural gas, as a response to the well-recognised challenges. As an answer to the crucial question of reduction of greenhouse gas emissions we propose new zero-emission fuel-fired power plants and boiler houses (‘‘ZEITMOP Boiler & Air Cooler’’ and ‘‘Zero Emission Membrane Smokeless Heating’’). Zero-emission co-generation of power and heat allows such plants to be located in densely populated areas close to the consumer.