Methane

Natural gas is an energy source with a "low environmental impact" that is able to meet a wide range of needs.
It is commonly used in the domestic, services and industrial sectors, as well as for the production of electricity and for transport.
It is an "eco-compatible" fuel in that emissions of polluting substances during combustion are much lower than for other fuels.
Nitrogen oxide emissions are lower than those of coal, fuel oil, diesel and petrol, while emissions of sulphur oxide, particulates and other hazardous substances are negligible.
When burnt, natural gas mainly produces water vapour (H2O) and carbon dioxide (CO2), two gaseous substances that exist in nature (that all of us produce when we breathe).
In any case, on an equal energy production basis, natural gas produces les carbon dioxide (on average from 25 to 40%) than other fossil fuels such as petrol and diesel.
Moreover, thanks to the development of a widespread distribution network of underground pipelines, gas is delivered directly to homes and factories, avoiding the additional transport by road required for liquid fuels. It should also be underlined that gas-powered vehicles (taxis, school buses, cars and buses) are currently one of the best responses to the need to reduce atmospheric pollution in cities.