Albeit being a fossil fuel, LNG still has a better environmental performance then the conventional fuels for trucks (diesel), inland barges (gasoil/fuel oil) and sea-going ships (heavy fuel oil). Typical air quality related emissions, greenhouse gasses emissions and noise emission levels all are lower compared to diesel, and certainly compared to fuel oils:
- Well to Wheel (propellor) greenhouse gas reduction 10 – 15%
- NOx and SOx reductions > 80% Source: TNO Report 2014 R11668
- Fine Particle emission reductions > 90% LNG for trucks and ships (Feb 2015)
A further improvement of the above numbers in the future can be realized through introduction of Bio-LNG, produced from green gas. Important also that in case of a spill of LNG on water or land, no remediation is required because it evaporates directly and dissipates quickly in the atmosphere.
Note that today no emission free technology exists for the propulsion of ships and large trucks. Electricity is just starting to drive passenger cars but it still is very difficult to carry enough energy for a reasonable distance. For trucks and ships E-powering is still decades away if ever but LNG can be introduced today already starting directly to reduce environmental emissions.