It has become common knowledge that greenhouse gases such as carbon dioxide and methane cause global warming, resulting in climate change. Tremendous efforts are made toward the reduction of greenhouse gas emissions to solve the issue via fundamental and applied research. CO₂ emission can be mitigated by improving the thermal efficiency of internal combustion engines. Innovation of thermodynamic cycles, for example, cogeneration, organic Rankine, and combined cycle with waste heat recovery leads to higher thermal efficiency. Recently, technologies for sequestrating or converting are emerging to suppress CO₂ accumulation in the atmosphere. While reducing fossil fuel dependency, renewable energy technologies also offer indirect technical solution of CO₂ emission. The contribution of those technologies on CO₂ mitigation is definitely remarkable, but more efforts still need to be made until the concentration of CO₂ in the atmosphere is sustainable. With such a goal in mind, this Special Issue aims to collect original research or review articles on various technologies conducive to the reduction of greenhouse gas emissions. The scope of the issue is wide and not limited to topics mentioned above. Any research topic contributing to greenhouse gas mitigation will be considered.
Keywords: greenhouse gas; waste heat recovery; carbon capture and sequestration; carbon capture and utilization; cogeneration; organic rankine cycle; CO₂ mitigation; renewable energy.