Which are the environmental benefits?

Which are the environmental benefits?

In case of petrol and gas oil vehicles, it is widely accepted that the main polluting elements are carbon oxides, nitrogen oxides and particulates (microscopic particles containing a chemical elements mix – just for diesel oil engine), which still are a big problem to resolve.
LPG has carbon and nitrogen oxides emissions much lower than the petrol engine ones and pollutes roughly a 90% less than any diesel oil vehicle for what concerns nitrogen oxides and particulates.
With LPG systems, co2 (carbon dioxide) emissions are reduced by 10%.