The aim of this research is to make policy recommendations at a global level from case studies of Denmark, the USA and China, which have implemented successful policies in the dynamic partnership between energy and the environment. For the aim, a theoretical framework is adopted within the scope of document analysis based on statistical data. The main conclusions obtained from the case studies indicate that natural gas can be used as a bridge fuel as a short-term solution to reduce CO2 emissions and, at the same time, since natural gas is not a completely clean energy source, it is necessary to turn to renewable energy sources for long-term solutions. Carbon capture and storage technologies, which are becoming increasingly important in the climate policies and net-zero emission strategies of countries, also constitute one of the short-term solution proposals.