Choosing between Compressed Natural Gas (CNG) and biogas depends on infrastructure availability and environmental priorities, as both serve as clean-burning transport and heating fuels. CNG offers higher energy density and immediate availability through widespread fossil fuel distribution networks, but it remains a non-renewable fossil fuel. Biogas, conversely, is a 100% renewable, carbon-neutral biofuel derived from organic waste recovery, though uncompressed raw biogas requires local utilization or capital-intensive scrubbing facilities to match CNG purity standards.