US emissions description is totally contentless now The US section is total nihil It is nothing more than a circular self referencing system of cryptic abbreviations without absolutely any kind of numerical data to back it up I guess you do not understand Well based on the wikipedia info a US partial zero emissions vehicle could either be a bicycle where the only emission is the cyclist s fart to be rude or a modified Hummer H1 SUV having an 1000 bhp Kenworth truck engine There is no numerical info on the page to let us decide which is the case Any person could create a system of circularly self referencing acronyms and abbreviations for emissions categories out of thin air Yet it would still be zero information content So either delete the US emissions section or add the numerical data how many grams of CO2 NOx SOx unburnt fuel particle charcoal matter are emitted per distance travelled to back up those cryptic PZEV and alike codes with verifieable information Look at the Euro X standard descriptions Each one is just a single sentence and it tells us the truth frankly Weight and numbers nothing else matters Acronyms are PR bullshit and do not belong to an ecyclopaedia It is a shame US people do not dare to face the polluting nature of their monster cars and try to hide the sad 20mpg reality behind cryptic PZEV and similar abbreviations In Europe 65mpg is reality now Regards Tamas Feher from Hungary E mail etomcat freemail hu