 Typically, July 1st is the date when states adjust their motor fuel taxes. Maryland is one of those states where gas and diesel taxes, they'll decrease by nine-tenths of a cent. However, fees will increase on hybrid and electric vehicles. Dan Ronan, WTOP News. Millions take non-prescription supplements every day for a myriad of purported health benefits, but can we trust the claims? Consumer man Herb Weisbaum, a contributing editor at Checkbook.org, has some tips.