▁Canada ▁Canada ' s ▁Compet ition ▁Bureau ▁along ▁with ▁the ▁Canadian ▁Stand ards ▁Association ▁are ▁disc ou rag ing ▁companies ▁from ▁making ▁" v ague ▁claims " ▁towards ▁their ▁products ' ▁environmental ▁impact . ▁Any ▁claims ▁must ▁be ▁back ed ▁up ▁by ▁" read ily ▁available ▁data ." ▁ ▁Norway ▁Norway ' s ▁consumer ▁om bud s man ▁has ▁target ed ▁autom akers ▁who ▁claim ▁that ▁their ▁cars ▁are ▁" green ," ▁" clean " ▁or ▁" environment ally ▁friendly " ▁with ▁some ▁of ▁the ▁world ' s ▁strict est ▁advert ising ▁gu idel ines . ▁Cons umer ▁O mb ud s man ▁official ▁B ente ▁ Ø ver li ▁said : ▁" C ars ▁cannot ▁do ▁anything ▁good ▁for ▁the ▁environment ▁except ▁less ▁damage ▁than ▁others ." ▁Man ufact ur ers ▁risk ▁fin es ▁if ▁they ▁fail ▁to ▁drop ▁the ▁words . ▁ Ø ver li ▁said ▁she ▁did ▁not ▁know ▁of ▁other ▁countries ▁going ▁so ▁far ▁in ▁crack ing ▁down ▁on ▁cars ▁and ▁the ▁environment . ▁ ▁U . S . ▁The ▁Federal ▁Trade ▁Commission ▁( FT C ) ▁provides ▁volunt ary ▁gu idel ines ▁for ▁environmental ▁market ing ▁claims . ▁These ▁gu idel ines ▁give ▁the ▁F TC ▁the ▁right ▁to ▁pro sec ute ▁false ▁and ▁mis leading ▁advert is ement ▁claims . ▁The ▁green ▁gu idel ines ▁were ▁not ▁created ▁to ▁be ▁used ▁as ▁an ▁en force able ▁guid eline ▁but ▁instead ▁were ▁intended ▁to ▁be ▁followed ▁volunt arily . ▁List ed ▁below ▁are ▁the ▁green ▁gu idel ines