Final answer:
Oil and natural gas systems, landfills, and refrigeration and air conditioning are significant energy sectors for the reduction of methane.
Step-by-step explanation:
Methane emissions can be reduced by targeting different sectors. One significant sector is oil and natural gas systems, which can implement technologies to capture and reduce methane leaks. Another potential sector is landfills, where methane is produced as a by-product of waste decomposition. By capturing and utilizing landfill gas, the emissions can be reduced. Additionally, refrigeration and air conditioning systems can also contribute to methane emissions, so implementing technologies to reduce leaks and improve efficiency in these systems is another significant potential for reducing methane.