cept ive . ▁Over statement ▁of ▁environmental ▁attribute : ▁An ▁environmental ▁market ing ▁claim ▁should ▁not ▁be ▁presented ▁in ▁a ▁manner ▁that ▁over states ▁the ▁environmental ▁attribute ▁or ▁benefit , ▁express ly ▁or ▁by ▁imp lication . ▁Mark eters ▁should ▁avoid ▁imp lications ▁of ▁significant ▁environmental ▁benefits ▁if ▁the ▁benefit ▁is ▁in ▁fact ▁neg lig ible . ▁Compar ative ▁claims : ▁Environment al ▁market ing ▁claims ▁that ▁include ▁a ▁compar ative ▁statement ▁should ▁be ▁presented ▁in ▁a ▁manner ▁that ▁makes ▁the ▁basis ▁for ▁the ▁comparison ▁sufficiently ▁clear ▁to ▁avoid ▁consumer ▁de ception . ▁In ▁addition , ▁the ▁advert iser ▁should ▁be ▁able ▁to ▁subst anti ate ▁the ▁comparison . ▁ ▁The ▁F TC ▁has ▁said ▁in ▁ 2 0 1 0 ▁that ▁it ▁will ▁update ▁its ▁gu idel ines ▁for ▁environmental ▁market ing ▁claims ▁in ▁an ▁attempt ▁to ▁reduce ▁green w ash ing . ▁The ▁revision ▁to ▁the ▁F TC ' s ▁Green ▁Gu ides ▁covers ▁a ▁wide ▁range ▁of ▁public ▁input , ▁including ▁hundreds ▁of ▁consumer ▁and ▁industry ▁comments ▁on ▁previously ▁proposed ▁revis ions . ▁The ▁updates ▁and ▁revision ▁to ▁the ▁existing ▁Gu ides ▁include ▁a ▁new ▁section ▁of ▁carbon ▁off sets , ▁" green " ▁cert ifications ▁and ▁se als ▁renew able ▁energy ▁and ▁renew able ▁materials ▁claims . ▁According ▁to ▁F TC ▁Chair man ▁Jon ▁Le ib ow itz , ▁" The ▁introduction ▁of ▁environment ally ▁friendly ▁products ▁into ▁the ▁market place ▁is ▁a ▁win ▁for ▁consum ers ▁who ▁want ▁to ▁purchase ▁gre ener ▁products ▁and ▁produ cers ▁who ▁wants